./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- 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-b5237d8 [2022-11-22 00:13:21,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:13:21,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:13:21,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:13:21,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:13:21,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:13:21,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:13:21,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:13:21,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:13:21,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:13:21,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:13:21,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:13:21,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:13:21,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:13:21,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:13:21,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:13:21,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:13:21,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:13:21,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:13:21,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:13:21,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:13:21,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:13:21,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:13:22,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:13:22,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:13:22,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:13:22,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:13:22,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:13:22,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:13:22,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:13:22,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:13:22,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:13:22,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:13:22,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:13:22,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:13:22,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:13:22,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:13:22,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:13:22,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:13:22,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:13:22,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:13:22,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:13:22,074 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:13:22,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:13:22,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:13:22,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:13:22,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:13:22,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:13:22,078 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:13:22,078 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:13:22,078 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:13:22,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:13:22,080 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:13:22,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:13:22,080 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:13:22,081 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:13:22,081 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:13:22,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:13:22,081 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:13:22,082 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:13:22,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:13:22,083 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:13:22,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:13:22,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:13:22,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:13:22,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:13:22,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:13:22,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:13:22,085 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:13:22,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:13:22,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:13:22,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:13:22,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:13:22,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:13:22,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:13:22,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:13:22,088 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:13:22,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:13:22,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:13:22,089 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:13:22,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:13:22,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:13:22,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:13:22,090 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_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2022-11-22 00:13:22,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:13:22,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:13:22,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:13:22,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:13:22,468 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:13:22,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-11-22 00:13:25,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:13:25,981 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:13:25,981 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-11-22 00:13:26,004 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/data/1d0c92aa1/85d88bf1251c48bb83bba0eb676952fa/FLAG30096291d [2022-11-22 00:13:26,021 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/data/1d0c92aa1/85d88bf1251c48bb83bba0eb676952fa [2022-11-22 00:13:26,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:13:26,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:13:26,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:13:26,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:13:26,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:13:26,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:26,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0caf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26, skipping insertion in model container [2022-11-22 00:13:26,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:26,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:13:26,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:13:26,383 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_65aa6e10-7643-4597-8c41-fdef508614c7/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-11-22 00:13:26,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:13:26,720 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:13:26,776 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_65aa6e10-7643-4597-8c41-fdef508614c7/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-11-22 00:13:26,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:13:26,929 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:13:26,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26 WrapperNode [2022-11-22 00:13:26,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:13:26,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:13:26,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:13:26,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:13:26,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:26,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,049 INFO L138 Inliner]: procedures = 95, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 873 [2022-11-22 00:13:27,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:13:27,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:13:27,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:13:27,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:13:27,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,169 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:13:27,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:13:27,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:13:27,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:13:27,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (1/1) ... [2022-11-22 00:13:27,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:13:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:27,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:13:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65aa6e10-7643-4597-8c41-fdef508614c7/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:13:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:13:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 00:13:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 00:13:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 00:13:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 00:13:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 00:13:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 00:13:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 00:13:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 00:13:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 00:13:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 00:13:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 00:13:27,286 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 00:13:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 00:13:27,286 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 00:13:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 00:13:27,286 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 00:13:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 00:13:27,286 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 00:13:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 00:13:27,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 00:13:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 00:13:27,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 00:13:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 00:13:27,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 00:13:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 00:13:27,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 00:13:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 00:13:27,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 00:13:27,287 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 00:13:27,288 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 00:13:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 00:13:27,288 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 00:13:27,288 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 00:13:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 00:13:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 00:13:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 00:13:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 00:13:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 00:13:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-22 00:13:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-22 00:13:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:13:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 00:13:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 00:13:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 00:13:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 00:13:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 00:13:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 00:13:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 00:13:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 00:13:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-22 00:13:27,294 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-22 00:13:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:13:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:13:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 00:13:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 00:13:27,488 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:13:27,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:13:28,816 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:13:29,727 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:13:29,727 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:13:29,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:13:29 BoogieIcfgContainer [2022-11-22 00:13:29,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:13:29,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:13:29,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:13:29,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:13:29,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:13:26" (1/3) ... [2022-11-22 00:13:29,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aab7ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:13:29, skipping insertion in model container [2022-11-22 00:13:29,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:13:26" (2/3) ... [2022-11-22 00:13:29,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aab7ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:13:29, skipping insertion in model container [2022-11-22 00:13:29,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:13:29" (3/3) ... [2022-11-22 00:13:29,746 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2022-11-22 00:13:29,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:13:29,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:13:29,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:13:29,859 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;@576e58fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:13:29,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:13:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-22 00:13:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 00:13:29,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:29,891 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] [2022-11-22 00:13:29,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1920796370, now seen corresponding path program 1 times [2022-11-22 00:13:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:29,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014687499] [2022-11-22 00:13:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:13:30,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:30,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014687499] [2022-11-22 00:13:30,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014687499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:30,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:30,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:13:30,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904027549] [2022-11-22 00:13:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:30,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 00:13:30,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 00:13:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:13:30,423 INFO L87 Difference]: Start difference. First operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 00:13:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:30,598 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-11-22 00:13:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 00:13:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-11-22 00:13:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:30,617 INFO L225 Difference]: With dead ends: 396 [2022-11-22 00:13:30,618 INFO L226 Difference]: Without dead ends: 374 [2022-11-22 00:13:30,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:13:30,624 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:30,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:13:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-22 00:13:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-11-22 00:13:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 252 states have (on average 1.5753968253968254) internal successors, (397), 273 states have internal predecessors, (397), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-22 00:13:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-11-22 00:13:30,710 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-11-22 00:13:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:30,712 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-11-22 00:13:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 00:13:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-11-22 00:13:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 00:13:30,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:30,717 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] [2022-11-22 00:13:30,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:13:30,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash -238457962, now seen corresponding path program 1 times [2022-11-22 00:13:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:30,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673277496] [2022-11-22 00:13:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:30,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:13:31,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673277496] [2022-11-22 00:13:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673277496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:31,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:13:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181189291] [2022-11-22 00:13:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:13:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:13:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:13:31,352 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:13:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:33,873 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-11-22 00:13:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:13:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-22 00:13:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:33,896 INFO L225 Difference]: With dead ends: 1210 [2022-11-22 00:13:33,896 INFO L226 Difference]: Without dead ends: 852 [2022-11-22 00:13:33,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:13:33,910 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1198 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:33,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 894 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 00:13:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-22 00:13:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-11-22 00:13:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 528 states have (on average 1.5909090909090908) internal successors, (840), 558 states have internal predecessors, (840), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2022-11-22 00:13:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-11-22 00:13:34,059 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-11-22 00:13:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:34,060 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-11-22 00:13:34,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:13:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-11-22 00:13:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:13:34,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:34,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:13:34,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:34,089 INFO L85 PathProgramCache]: Analyzing trace with hash -984985736, now seen corresponding path program 1 times [2022-11-22 00:13:34,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:34,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247369193] [2022-11-22 00:13:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:34,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:13:34,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:34,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247369193] [2022-11-22 00:13:34,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247369193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:34,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:34,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:13:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589043983] [2022-11-22 00:13:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:13:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:13:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:13:34,626 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:13:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:38,257 INFO L93 Difference]: Finished difference Result 2572 states and 4125 transitions. [2022-11-22 00:13:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 00:13:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-11-22 00:13:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:38,271 INFO L225 Difference]: With dead ends: 2572 [2022-11-22 00:13:38,271 INFO L226 Difference]: Without dead ends: 1833 [2022-11-22 00:13:38,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:13:38,276 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1280 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:38,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1962 Invalid, 4959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-22 00:13:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-22 00:13:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1680. [2022-11-22 00:13:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1143 states have (on average 1.5643044619422573) internal successors, (1788), 1215 states have internal predecessors, (1788), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-11-22 00:13:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2685 transitions. [2022-11-22 00:13:38,422 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2685 transitions. Word has length 75 [2022-11-22 00:13:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:38,422 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2685 transitions. [2022-11-22 00:13:38,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:13:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2685 transitions. [2022-11-22 00:13:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:13:38,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:38,425 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] [2022-11-22 00:13:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:13:38,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1337377476, now seen corresponding path program 1 times [2022-11-22 00:13:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:38,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437520186] [2022-11-22 00:13:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:38,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:13:38,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:38,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437520186] [2022-11-22 00:13:38,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437520186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:38,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:38,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:13:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490638183] [2022-11-22 00:13:38,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:13:38,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:13:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:13:38,748 INFO L87 Difference]: Start difference. First operand 1680 states and 2685 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-22 00:13:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:39,235 INFO L93 Difference]: Finished difference Result 3915 states and 6340 transitions. [2022-11-22 00:13:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:13:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-11-22 00:13:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:39,254 INFO L225 Difference]: With dead ends: 3915 [2022-11-22 00:13:39,254 INFO L226 Difference]: Without dead ends: 2253 [2022-11-22 00:13:39,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:39,265 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 177 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:39,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2240 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:13:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-11-22 00:13:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1698. [2022-11-22 00:13:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1161 states have (on average 1.5555555555555556) internal successors, (1806), 1233 states have internal predecessors, (1806), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-11-22 00:13:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2703 transitions. [2022-11-22 00:13:39,483 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2703 transitions. Word has length 76 [2022-11-22 00:13:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:39,484 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2703 transitions. [2022-11-22 00:13:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-22 00:13:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2703 transitions. [2022-11-22 00:13:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 00:13:39,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:39,489 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:39,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:13:39,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998400, now seen corresponding path program 1 times [2022-11-22 00:13:39,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:39,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696286470] [2022-11-22 00:13:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:39,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696286470] [2022-11-22 00:13:39,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696286470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:39,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:39,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 00:13:39,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159637021] [2022-11-22 00:13:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:39,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:13:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:39,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:13:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:13:39,962 INFO L87 Difference]: Start difference. First operand 1698 states and 2703 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-22 00:13:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:43,448 INFO L93 Difference]: Finished difference Result 4769 states and 7618 transitions. [2022-11-22 00:13:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 00:13:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2022-11-22 00:13:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:43,511 INFO L225 Difference]: With dead ends: 4769 [2022-11-22 00:13:43,511 INFO L226 Difference]: Without dead ends: 3089 [2022-11-22 00:13:43,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:13:43,520 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1715 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 3922 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 4509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 3922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:43,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 2331 Invalid, 4509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 3922 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 00:13:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-11-22 00:13:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2954. [2022-11-22 00:13:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2093 states have (on average 1.5805064500716675) internal successors, (3308), 2184 states have internal predecessors, (3308), 680 states have call successors, (680), 150 states have call predecessors, (680), 180 states have return successors, (743), 663 states have call predecessors, (743), 675 states have call successors, (743) [2022-11-22 00:13:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4731 transitions. [2022-11-22 00:13:43,766 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4731 transitions. Word has length 78 [2022-11-22 00:13:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:43,766 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4731 transitions. [2022-11-22 00:13:43,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-22 00:13:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4731 transitions. [2022-11-22 00:13:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 00:13:43,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:43,770 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:13:43,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1996315124, now seen corresponding path program 1 times [2022-11-22 00:13:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:43,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602759360] [2022-11-22 00:13:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:44,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602759360] [2022-11-22 00:13:44,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602759360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:44,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:44,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:13:44,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59419950] [2022-11-22 00:13:44,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:44,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:13:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:13:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:44,127 INFO L87 Difference]: Start difference. First operand 2954 states and 4731 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 00:13:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:44,566 INFO L93 Difference]: Finished difference Result 5282 states and 8482 transitions. [2022-11-22 00:13:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:13:44,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-22 00:13:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:44,588 INFO L225 Difference]: With dead ends: 5282 [2022-11-22 00:13:44,589 INFO L226 Difference]: Without dead ends: 3066 [2022-11-22 00:13:44,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:44,602 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 7 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:44,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3242 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:13:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2022-11-22 00:13:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3024. [2022-11-22 00:13:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 2143 states have (on average 1.566962202519832) internal successors, (3358), 2234 states have internal predecessors, (3358), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 683 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-22 00:13:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4831 transitions. [2022-11-22 00:13:44,905 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4831 transitions. Word has length 83 [2022-11-22 00:13:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:44,906 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 4831 transitions. [2022-11-22 00:13:44,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 00:13:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4831 transitions. [2022-11-22 00:13:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 00:13:44,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:44,909 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:44,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:13:44,910 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash -591162, now seen corresponding path program 1 times [2022-11-22 00:13:44,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:44,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027508284] [2022-11-22 00:13:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:44,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:45,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027508284] [2022-11-22 00:13:45,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027508284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:45,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:45,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:13:45,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568497885] [2022-11-22 00:13:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:45,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:13:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:13:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:45,218 INFO L87 Difference]: Start difference. First operand 3024 states and 4831 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 00:13:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:45,648 INFO L93 Difference]: Finished difference Result 5388 states and 8622 transitions. [2022-11-22 00:13:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:13:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-22 00:13:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:45,674 INFO L225 Difference]: With dead ends: 5388 [2022-11-22 00:13:45,675 INFO L226 Difference]: Without dead ends: 3116 [2022-11-22 00:13:45,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:45,691 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 6 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:45,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3261 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:13:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-11-22 00:13:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3034. [2022-11-22 00:13:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 2153 states have (on average 1.564328843474222) internal successors, (3368), 2234 states have internal predecessors, (3368), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 693 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-22 00:13:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4841 transitions. [2022-11-22 00:13:45,978 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4841 transitions. Word has length 82 [2022-11-22 00:13:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:45,979 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4841 transitions. [2022-11-22 00:13:45,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 00:13:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4841 transitions. [2022-11-22 00:13:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 00:13:45,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:45,985 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:45,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:13:45,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:45,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1877902356, now seen corresponding path program 1 times [2022-11-22 00:13:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:45,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728420231] [2022-11-22 00:13:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:45,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:46,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728420231] [2022-11-22 00:13:46,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728420231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:46,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:46,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:13:46,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043568409] [2022-11-22 00:13:46,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:46,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:13:46,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:13:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:46,324 INFO L87 Difference]: Start difference. First operand 3034 states and 4841 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 00:13:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:46,851 INFO L93 Difference]: Finished difference Result 5406 states and 8640 transitions. [2022-11-22 00:13:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:13:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-22 00:13:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:46,876 INFO L225 Difference]: With dead ends: 5406 [2022-11-22 00:13:46,877 INFO L226 Difference]: Without dead ends: 3126 [2022-11-22 00:13:46,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:13:46,893 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:46,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3266 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:13:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-11-22 00:13:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3044. [2022-11-22 00:13:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2163 states have (on average 1.5617198335644937) internal successors, (3378), 2234 states have internal predecessors, (3378), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 703 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-22 00:13:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4851 transitions. [2022-11-22 00:13:47,147 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4851 transitions. Word has length 83 [2022-11-22 00:13:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:47,147 INFO L495 AbstractCegarLoop]: Abstraction has 3044 states and 4851 transitions. [2022-11-22 00:13:47,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 00:13:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4851 transitions. [2022-11-22 00:13:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 00:13:47,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:47,151 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:47,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:13:47,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -385724476, now seen corresponding path program 1 times [2022-11-22 00:13:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:47,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848504666] [2022-11-22 00:13:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:47,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:47,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848504666] [2022-11-22 00:13:47,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848504666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:47,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:47,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:13:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467913445] [2022-11-22 00:13:47,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:47,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:13:47,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:13:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:13:47,555 INFO L87 Difference]: Start difference. First operand 3044 states and 4851 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-22 00:13:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:50,363 INFO L93 Difference]: Finished difference Result 7552 states and 12115 transitions. [2022-11-22 00:13:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:13:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2022-11-22 00:13:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:50,395 INFO L225 Difference]: With dead ends: 7552 [2022-11-22 00:13:50,395 INFO L226 Difference]: Without dead ends: 5022 [2022-11-22 00:13:50,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:13:50,414 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1689 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:50,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 1365 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 00:13:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-11-22 00:13:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 4910. [2022-11-22 00:13:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3416 states have (on average 1.5199063231850116) internal successors, (5192), 3557 states have internal predecessors, (5192), 1147 states have call successors, (1147), 266 states have call predecessors, (1147), 346 states have return successors, (1367), 1163 states have call predecessors, (1367), 1142 states have call successors, (1367) [2022-11-22 00:13:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7706 transitions. [2022-11-22 00:13:50,906 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7706 transitions. Word has length 87 [2022-11-22 00:13:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:50,907 INFO L495 AbstractCegarLoop]: Abstraction has 4910 states and 7706 transitions. [2022-11-22 00:13:50,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-22 00:13:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7706 transitions. [2022-11-22 00:13:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-22 00:13:50,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:50,911 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:50,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:13:50,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1618916369, now seen corresponding path program 1 times [2022-11-22 00:13:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:50,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307103420] [2022-11-22 00:13:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:51,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307103420] [2022-11-22 00:13:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307103420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:51,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 00:13:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693617967] [2022-11-22 00:13:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:51,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:13:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:13:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:13:51,521 INFO L87 Difference]: Start difference. First operand 4910 states and 7706 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-22 00:13:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:57,395 INFO L93 Difference]: Finished difference Result 10325 states and 16514 transitions. [2022-11-22 00:13:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 00:13:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 90 [2022-11-22 00:13:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:57,439 INFO L225 Difference]: With dead ends: 10325 [2022-11-22 00:13:57,439 INFO L226 Difference]: Without dead ends: 5841 [2022-11-22 00:13:57,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 00:13:57,471 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 2024 mSDsluCounter, 3648 mSDsCounter, 0 mSdLazyCounter, 7682 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 4134 SdHoareTripleChecker+Invalid, 8855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 7682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:57,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 4134 Invalid, 8855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1173 Valid, 7682 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-22 00:13:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-11-22 00:13:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5691. [2022-11-22 00:13:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 4127 states have (on average 1.5294402713835715) internal successors, (6312), 4288 states have internal predecessors, (6312), 1167 states have call successors, (1167), 296 states have call predecessors, (1167), 396 states have return successors, (1387), 1183 states have call predecessors, (1387), 1162 states have call successors, (1387) [2022-11-22 00:13:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 8866 transitions. [2022-11-22 00:13:58,031 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 8866 transitions. Word has length 90 [2022-11-22 00:13:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:58,032 INFO L495 AbstractCegarLoop]: Abstraction has 5691 states and 8866 transitions. [2022-11-22 00:13:58,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-22 00:13:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 8866 transitions. [2022-11-22 00:13:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-22 00:13:58,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:58,035 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:13:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:13:58,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1094495665, now seen corresponding path program 1 times [2022-11-22 00:13:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002451030] [2022-11-22 00:13:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:13:58,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002451030] [2022-11-22 00:13:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002451030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:58,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:13:58,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:13:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260398923] [2022-11-22 00:13:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:58,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:13:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:13:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:13:58,369 INFO L87 Difference]: Start difference. First operand 5691 states and 8866 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 00:14:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:02,539 INFO L93 Difference]: Finished difference Result 18506 states and 29592 transitions. [2022-11-22 00:14:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:14:02,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2022-11-22 00:14:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:02,617 INFO L225 Difference]: With dead ends: 18506 [2022-11-22 00:14:02,617 INFO L226 Difference]: Without dead ends: 12833 [2022-11-22 00:14:02,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:14:02,646 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2218 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:02,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 1593 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 00:14:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12833 states. [2022-11-22 00:14:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12833 to 11957. [2022-11-22 00:14:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 8499 states have (on average 1.5166490175314742) internal successors, (12890), 8942 states have internal predecessors, (12890), 2644 states have call successors, (2644), 608 states have call predecessors, (2644), 813 states have return successors, (3306), 2637 states have call predecessors, (3306), 2639 states have call successors, (3306) [2022-11-22 00:14:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 18840 transitions. [2022-11-22 00:14:03,987 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 18840 transitions. Word has length 90 [2022-11-22 00:14:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:03,988 INFO L495 AbstractCegarLoop]: Abstraction has 11957 states and 18840 transitions. [2022-11-22 00:14:03,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 00:14:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 18840 transitions. [2022-11-22 00:14:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 00:14:03,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:03,993 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:14:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:14:03,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:14:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1459145640, now seen corresponding path program 1 times [2022-11-22 00:14:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:03,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507340043] [2022-11-22 00:14:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:14:04,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507340043] [2022-11-22 00:14:04,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507340043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:14:04,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:14:04,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:14:04,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643942742] [2022-11-22 00:14:04,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:14:04,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:14:04,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:04,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:14:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:14:04,404 INFO L87 Difference]: Start difference. First operand 11957 states and 18840 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 00:14:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:07,492 INFO L93 Difference]: Finished difference Result 23286 states and 36876 transitions. [2022-11-22 00:14:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:14:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-11-22 00:14:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:07,599 INFO L225 Difference]: With dead ends: 23286 [2022-11-22 00:14:07,600 INFO L226 Difference]: Without dead ends: 12875 [2022-11-22 00:14:07,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:14:07,657 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 969 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:07,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 1482 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 00:14:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2022-11-22 00:14:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12163. [2022-11-22 00:14:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12163 states, 8643 states have (on average 1.5133634154807358) internal successors, (13080), 9114 states have internal predecessors, (13080), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-11-22 00:14:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 19112 transitions. [2022-11-22 00:14:09,084 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 19112 transitions. Word has length 91 [2022-11-22 00:14:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:09,085 INFO L495 AbstractCegarLoop]: Abstraction has 12163 states and 19112 transitions. [2022-11-22 00:14:09,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 00:14:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 19112 transitions. [2022-11-22 00:14:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 00:14:09,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:09,089 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] [2022-11-22 00:14:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:14:09,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:14:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1654323053, now seen corresponding path program 1 times [2022-11-22 00:14:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:09,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874073425] [2022-11-22 00:14:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:14:09,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874073425] [2022-11-22 00:14:09,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874073425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:14:09,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:14:09,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:14:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760606264] [2022-11-22 00:14:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:14:09,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:14:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:14:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:14:09,366 INFO L87 Difference]: Start difference. First operand 12163 states and 19112 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 00:14:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:10,756 INFO L93 Difference]: Finished difference Result 12289 states and 19321 transitions. [2022-11-22 00:14:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:14:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-11-22 00:14:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:10,827 INFO L225 Difference]: With dead ends: 12289 [2022-11-22 00:14:10,827 INFO L226 Difference]: Without dead ends: 12274 [2022-11-22 00:14:10,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:14:10,838 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 649 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:10,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1800 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:14:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2022-11-22 00:14:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 12171. [2022-11-22 00:14:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12171 states, 8651 states have (on average 1.5128886833892035) internal successors, (13088), 9122 states have internal predecessors, (13088), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-11-22 00:14:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12171 states to 12171 states and 19120 transitions. [2022-11-22 00:14:12,157 INFO L78 Accepts]: Start accepts. Automaton has 12171 states and 19120 transitions. Word has length 95 [2022-11-22 00:14:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:12,158 INFO L495 AbstractCegarLoop]: Abstraction has 12171 states and 19120 transitions. [2022-11-22 00:14:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 00:14:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 12171 states and 19120 transitions. [2022-11-22 00:14:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 00:14:12,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:12,163 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] [2022-11-22 00:14:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:14:12,163 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:14:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1279064998, now seen corresponding path program 1 times [2022-11-22 00:14:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:12,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710133183] [2022-11-22 00:14:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:14:12,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710133183] [2022-11-22 00:14:12,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710133183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:14:12,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:14:12,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 00:14:12,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481713295] [2022-11-22 00:14:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:14:12,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:14:12,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:14:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:14:12,899 INFO L87 Difference]: Start difference. First operand 12171 states and 19120 transitions. Second operand has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 00:14:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:19,146 INFO L93 Difference]: Finished difference Result 13281 states and 20832 transitions. [2022-11-22 00:14:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 00:14:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 100 [2022-11-22 00:14:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:19,222 INFO L225 Difference]: With dead ends: 13281 [2022-11-22 00:14:19,222 INFO L226 Difference]: Without dead ends: 13264 [2022-11-22 00:14:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 00:14:19,238 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 2552 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2578 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 9198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:19,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2578 Valid, 3559 Invalid, 9198 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1430 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-22 00:14:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13264 states. [2022-11-22 00:14:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13264 to 12791. [2022-11-22 00:14:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12791 states, 9139 states have (on average 1.520078783236678) internal successors, (13892), 9606 states have internal predecessors, (13892), 2690 states have call successors, (2690), 731 states have call predecessors, (2690), 961 states have return successors, (3437), 2684 states have call predecessors, (3437), 2685 states have call successors, (3437) [2022-11-22 00:14:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12791 states to 12791 states and 20019 transitions. [2022-11-22 00:14:20,296 INFO L78 Accepts]: Start accepts. Automaton has 12791 states and 20019 transitions. Word has length 100 [2022-11-22 00:14:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:20,297 INFO L495 AbstractCegarLoop]: Abstraction has 12791 states and 20019 transitions. [2022-11-22 00:14:20,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 00:14:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12791 states and 20019 transitions. [2022-11-22 00:14:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-22 00:14:20,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:20,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:14:20,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 00:14:20,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:14:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1114040842, now seen corresponding path program 1 times [2022-11-22 00:14:20,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:20,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303888314] [2022-11-22 00:14:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:20,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:14:20,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303888314] [2022-11-22 00:14:20,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303888314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:14:20,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:14:20,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:14:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367690016] [2022-11-22 00:14:20,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:14:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:14:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:14:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:14:20,438 INFO L87 Difference]: Start difference. First operand 12791 states and 20019 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 00:14:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:22,642 INFO L93 Difference]: Finished difference Result 35491 states and 55920 transitions. [2022-11-22 00:14:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:14:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-11-22 00:14:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:22,770 INFO L225 Difference]: With dead ends: 35491 [2022-11-22 00:14:22,771 INFO L226 Difference]: Without dead ends: 22723 [2022-11-22 00:14:22,828 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 [2022-11-22 00:14:22,829 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 540 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:22,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:14:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22723 states. [2022-11-22 00:14:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22723 to 22414. [2022-11-22 00:14:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22414 states, 16077 states have (on average 1.519873110654973) internal successors, (24435), 16942 states have internal predecessors, (24435), 4649 states have call successors, (4649), 1279 states have call predecessors, (4649), 1687 states have return successors, (6162), 4528 states have call predecessors, (6162), 4644 states have call successors, (6162) [2022-11-22 00:14:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22414 states to 22414 states and 35246 transitions. [2022-11-22 00:14:25,477 INFO L78 Accepts]: Start accepts. Automaton has 22414 states and 35246 transitions. Word has length 107 [2022-11-22 00:14:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:25,478 INFO L495 AbstractCegarLoop]: Abstraction has 22414 states and 35246 transitions. [2022-11-22 00:14:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 00:14:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 22414 states and 35246 transitions. [2022-11-22 00:14:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 00:14:25,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:25,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:14:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 00:14:25,483 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:14:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1991317736, now seen corresponding path program 1 times [2022-11-22 00:14:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372115128] [2022-11-22 00:14:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:14:25,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:25,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372115128] [2022-11-22 00:14:25,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372115128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:14:25,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:14:25,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:14:25,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319915142] [2022-11-22 00:14:25,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:14:25,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:14:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:14:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:14:25,768 INFO L87 Difference]: Start difference. First operand 22414 states and 35246 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 00:14:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:29,767 INFO L93 Difference]: Finished difference Result 64359 states and 102160 transitions. [2022-11-22 00:14:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:14:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 109 [2022-11-22 00:14:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:30,083 INFO L225 Difference]: With dead ends: 64359 [2022-11-22 00:14:30,084 INFO L226 Difference]: Without dead ends: 41971 [2022-11-22 00:14:30,207 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 [2022-11-22 00:14:30,208 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 539 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:30,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1199 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:14:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41971 states. [2022-11-22 00:14:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41971 to 41671. [2022-11-22 00:14:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41671 states, 29964 states have (on average 1.5186223468161795) internal successors, (45504), 31625 states have internal predecessors, (45504), 8567 states have call successors, (8567), 2375 states have call predecessors, (8567), 3139 states have return successors, (11920), 8216 states have call predecessors, (11920), 8562 states have call successors, (11920) [2022-11-22 00:14:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41671 states to 41671 states and 65991 transitions. [2022-11-22 00:14:34,054 INFO L78 Accepts]: Start accepts. Automaton has 41671 states and 65991 transitions. Word has length 109 [2022-11-22 00:14:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 41671 states and 65991 transitions. [2022-11-22 00:14:34,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 00:14:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 41671 states and 65991 transitions. [2022-11-22 00:14:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 00:14:34,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:34,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:14:34,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 00:14:34,060 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:14:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1150817672, now seen corresponding path program 1 times [2022-11-22 00:14:34,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:34,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713958029] [2022-11-22 00:14:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:14:34,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713958029] [2022-11-22 00:14:34,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713958029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:14:34,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:14:34,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:14:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359588692] [2022-11-22 00:14:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:14:34,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:14:34,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:14:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:14:34,180 INFO L87 Difference]: Start difference. First operand 41671 states and 65991 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 00:14:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:41,100 INFO L93 Difference]: Finished difference Result 122126 states and 196136 transitions. [2022-11-22 00:14:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:14:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 109 [2022-11-22 00:14:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:41,478 INFO L225 Difference]: With dead ends: 122126 [2022-11-22 00:14:41,478 INFO L226 Difference]: Without dead ends: 80487 [2022-11-22 00:14:41,827 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 [2022-11-22 00:14:41,829 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 538 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:41,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1206 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:14:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80487 states.