./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur --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 cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- 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-38b53e6 [2022-11-25 22:17:23,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:17:23,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:17:23,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:17:23,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:17:23,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:17:23,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:17:23,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:17:23,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:17:23,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:17:23,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:17:23,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:17:23,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:17:23,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:17:23,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:17:23,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:17:23,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:17:23,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:17:23,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:17:23,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:17:23,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:17:23,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:17:23,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:17:23,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:17:23,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:17:23,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:17:23,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:17:23,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:17:23,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:17:23,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:17:23,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:17:23,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:17:23,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:17:23,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:17:23,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:17:23,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:17:23,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:17:23,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:17:23,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:17:23,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:17:23,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:17:23,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:17:23,353 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:17:23,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:17:23,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:17:23,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:17:23,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:17:23,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:17:23,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:17:23,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:17:23,359 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:17:23,359 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:17:23,361 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:17:23,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:17:23,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:17:23,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:17:23,362 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:17:23,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:17:23,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:17:23,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:17:23,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:17:23,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:17:23,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:17:23,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:17:23,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:17:23,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:17:23,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:17:23,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:17:23,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:17:23,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:17:23,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:17:23,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:17:23,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:17:23,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:17:23,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:17:23,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:17:23,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:17:23,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:17:23,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:17:23,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:17:23,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:17:23,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:17:23,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:17:23,369 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_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2022-11-25 22:17:23,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:17:23,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:17:23,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:17:23,714 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:17:23,714 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:17:23,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-11-25 22:17:26,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:17:27,123 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:17:27,124 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-11-25 22:17:27,141 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/data/c676334e9/f71776de148f468f946d6e4ef37d3d4e/FLAGc76bc00b9 [2022-11-25 22:17:27,158 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/data/c676334e9/f71776de148f468f946d6e4ef37d3d4e [2022-11-25 22:17:27,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:17:27,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:17:27,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:17:27,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:17:27,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:17:27,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:17:27" (1/1) ... [2022-11-25 22:17:27,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7012d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:27, skipping insertion in model container [2022-11-25 22:17:27,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:17:27" (1/1) ... [2022-11-25 22:17:27,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:17:27,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:17:27,891 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_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-11-25 22:17:27,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:17:27,922 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:17:28,120 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_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-11-25 22:17:28,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:17:28,147 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:17:28,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28 WrapperNode [2022-11-25 22:17:28,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:17:28,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:17:28,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:17:28,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:17:28,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,236 INFO L138 Inliner]: procedures = 89, calls = 327, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 771 [2022-11-25 22:17:28,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:17:28,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:17:28,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:17:28,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:17:28,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:17:28,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:17:28,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:17:28,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:17:28,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (1/1) ... [2022-11-25 22:17:28,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:17:28,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:28,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:17:28,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:17:28,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:17:28,451 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-25 22:17:28,451 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-25 22:17:28,451 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 22:17:28,452 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 22:17:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 22:17:28,452 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 22:17:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 22:17:28,452 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 22:17:28,453 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 22:17:28,453 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 22:17:28,453 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 22:17:28,453 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 22:17:28,453 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 22:17:28,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 22:17:28,454 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 22:17:28,454 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 22:17:28,454 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 22:17:28,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 22:17:28,454 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 22:17:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 22:17:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 22:17:28,456 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 22:17:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 22:17:28,457 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 22:17:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 22:17:28,459 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 22:17:28,459 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 22:17:28,459 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 22:17:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 22:17:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 22:17:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-25 22:17:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-25 22:17:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:17:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 22:17:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 22:17:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 22:17:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 22:17:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 22:17:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 22:17:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:17:28,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:17:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 22:17:28,465 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 22:17:28,738 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:17:28,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:17:30,139 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:17:31,040 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:17:31,040 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:17:31,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:17:31 BoogieIcfgContainer [2022-11-25 22:17:31,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:17:31,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:17:31,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:17:31,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:17:31,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:17:27" (1/3) ... [2022-11-25 22:17:31,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5982d30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:17:31, skipping insertion in model container [2022-11-25 22:17:31,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:17:28" (2/3) ... [2022-11-25 22:17:31,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5982d30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:17:31, skipping insertion in model container [2022-11-25 22:17:31,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:17:31" (3/3) ... [2022-11-25 22:17:31,062 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2022-11-25 22:17:31,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:17:31,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:17:31,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:17:31,190 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;@66bcbbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:17:31,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:17:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-25 22:17:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 22:17:31,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:31,236 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] [2022-11-25 22:17:31,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 751116243, now seen corresponding path program 1 times [2022-11-25 22:17:31,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:31,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949793552] [2022-11-25 22:17:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:31,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949793552] [2022-11-25 22:17:31,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949793552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:31,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:31,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:17:31,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125633481] [2022-11-25 22:17:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:17:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:17:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:17:31,830 INFO L87 Difference]: Start difference. First operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-25 22:17:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:32,041 INFO L93 Difference]: Finished difference Result 350 states and 563 transitions. [2022-11-25 22:17:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:17:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-11-25 22:17:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:32,067 INFO L225 Difference]: With dead ends: 350 [2022-11-25 22:17:32,070 INFO L226 Difference]: Without dead ends: 328 [2022-11-25 22:17:32,079 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 [2022-11-25 22:17:32,083 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:32,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-25 22:17:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-11-25 22:17:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 225 states have (on average 1.6177777777777778) internal successors, (364), 244 states have internal predecessors, (364), 83 states have call successors, (83), 20 states have call predecessors, (83), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-25 22:17:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2022-11-25 22:17:32,204 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 51 [2022-11-25 22:17:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:32,208 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2022-11-25 22:17:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-25 22:17:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2022-11-25 22:17:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 22:17:32,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:32,219 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] [2022-11-25 22:17:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:17:32,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1743434788, now seen corresponding path program 1 times [2022-11-25 22:17:32,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:32,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453423610] [2022-11-25 22:17:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:32,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:32,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453423610] [2022-11-25 22:17:32,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453423610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:32,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:32,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:17:32,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475913587] [2022-11-25 22:17:32,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:17:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:17:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:32,704 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 22:17:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:35,618 INFO L93 Difference]: Finished difference Result 1093 states and 1782 transitions. [2022-11-25 22:17:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:17:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-11-25 22:17:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:35,626 INFO L225 Difference]: With dead ends: 1093 [2022-11-25 22:17:35,626 INFO L226 Difference]: Without dead ends: 781 [2022-11-25 22:17:35,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:17:35,632 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1578 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:35,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 1417 Invalid, 2854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [482 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 22:17:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-25 22:17:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 743. [2022-11-25 22:17:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 530 states have (on average 1.6471698113207547) internal successors, (873), 565 states have internal predecessors, (873), 171 states have call successors, (171), 39 states have call predecessors, (171), 41 states have return successors, (172), 163 states have call predecessors, (172), 166 states have call successors, (172) [2022-11-25 22:17:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1216 transitions. [2022-11-25 22:17:35,717 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1216 transitions. Word has length 52 [2022-11-25 22:17:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:35,718 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1216 transitions. [2022-11-25 22:17:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 22:17:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1216 transitions. [2022-11-25 22:17:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 22:17:35,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:35,722 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] [2022-11-25 22:17:35,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:17:35,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1616890586, now seen corresponding path program 1 times [2022-11-25 22:17:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:35,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946184125] [2022-11-25 22:17:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:36,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946184125] [2022-11-25 22:17:36,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946184125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:36,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:36,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:17:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757172381] [2022-11-25 22:17:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:36,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:17:36,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:36,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:17:36,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:36,114 INFO L87 Difference]: Start difference. First operand 743 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 22:17:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:36,324 INFO L93 Difference]: Finished difference Result 1231 states and 2018 transitions. [2022-11-25 22:17:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:17:36,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-11-25 22:17:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:36,333 INFO L225 Difference]: With dead ends: 1231 [2022-11-25 22:17:36,334 INFO L226 Difference]: Without dead ends: 791 [2022-11-25 22:17:36,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:36,343 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 30 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:36,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2005 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-25 22:17:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 755. [2022-11-25 22:17:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 539 states have (on average 1.6363636363636365) internal successors, (882), 574 states have internal predecessors, (882), 171 states have call successors, (171), 39 states have call predecessors, (171), 44 states have return successors, (178), 166 states have call predecessors, (178), 166 states have call successors, (178) [2022-11-25 22:17:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1231 transitions. [2022-11-25 22:17:36,435 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1231 transitions. Word has length 56 [2022-11-25 22:17:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:36,438 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1231 transitions. [2022-11-25 22:17:36,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 22:17:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1231 transitions. [2022-11-25 22:17:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 22:17:36,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:36,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:17:36,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1771186690, now seen corresponding path program 1 times [2022-11-25 22:17:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:36,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035636451] [2022-11-25 22:17:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:36,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035636451] [2022-11-25 22:17:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035636451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:36,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:36,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:17:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741079049] [2022-11-25 22:17:36,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:36,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:17:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:17:36,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:17:36,883 INFO L87 Difference]: Start difference. First operand 755 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-25 22:17:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:39,305 INFO L93 Difference]: Finished difference Result 1689 states and 2743 transitions. [2022-11-25 22:17:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:17:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-11-25 22:17:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:39,325 INFO L225 Difference]: With dead ends: 1689 [2022-11-25 22:17:39,325 INFO L226 Difference]: Without dead ends: 1141 [2022-11-25 22:17:39,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:17:39,336 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 2331 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:39,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 960 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 22:17:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-11-25 22:17:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1069. [2022-11-25 22:17:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5890957446808511) internal successors, (1195), 804 states have internal predecessors, (1195), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-11-25 22:17:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1703 transitions. [2022-11-25 22:17:39,420 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1703 transitions. Word has length 60 [2022-11-25 22:17:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:39,421 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1703 transitions. [2022-11-25 22:17:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-25 22:17:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1703 transitions. [2022-11-25 22:17:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 22:17:39,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:39,423 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] [2022-11-25 22:17:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:17:39,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2013170515, now seen corresponding path program 1 times [2022-11-25 22:17:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:39,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908393772] [2022-11-25 22:17:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:39,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:39,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908393772] [2022-11-25 22:17:39,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908393772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:39,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:39,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:17:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772669913] [2022-11-25 22:17:39,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:39,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:39,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:39,662 INFO L87 Difference]: Start difference. First operand 1069 states and 1703 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:17:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:39,933 INFO L93 Difference]: Finished difference Result 2075 states and 3361 transitions. [2022-11-25 22:17:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:17:39,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-25 22:17:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:39,941 INFO L225 Difference]: With dead ends: 2075 [2022-11-25 22:17:39,942 INFO L226 Difference]: Without dead ends: 1069 [2022-11-25 22:17:39,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:39,947 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 210 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:39,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1326 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:17:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-11-25 22:17:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2022-11-25 22:17:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5465425531914894) internal successors, (1163), 804 states have internal predecessors, (1163), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-11-25 22:17:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1671 transitions. [2022-11-25 22:17:40,024 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1671 transitions. Word has length 63 [2022-11-25 22:17:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:40,025 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1671 transitions. [2022-11-25 22:17:40,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 22:17:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1671 transitions. [2022-11-25 22:17:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 22:17:40,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:40,027 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] [2022-11-25 22:17:40,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:17:40,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash 21526359, now seen corresponding path program 1 times [2022-11-25 22:17:40,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:40,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82907999] [2022-11-25 22:17:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:40,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:17:40,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82907999] [2022-11-25 22:17:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82907999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:40,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:40,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:17:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942613374] [2022-11-25 22:17:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:40,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:17:40,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:17:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:40,346 INFO L87 Difference]: Start difference. First operand 1069 states and 1671 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 22:17:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:42,294 INFO L93 Difference]: Finished difference Result 2007 states and 3144 transitions. [2022-11-25 22:17:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:17:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-11-25 22:17:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:42,302 INFO L225 Difference]: With dead ends: 2007 [2022-11-25 22:17:42,302 INFO L226 Difference]: Without dead ends: 1202 [2022-11-25 22:17:42,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:17:42,308 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 869 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:42,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 1276 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 22:17:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-11-25 22:17:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1096. [2022-11-25 22:17:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 770 states have (on average 1.5389610389610389) internal successors, (1185), 826 states have internal predecessors, (1185), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-25 22:17:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1705 transitions. [2022-11-25 22:17:42,378 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1705 transitions. Word has length 65 [2022-11-25 22:17:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1705 transitions. [2022-11-25 22:17:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 22:17:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1705 transitions. [2022-11-25 22:17:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 22:17:42,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:42,384 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] [2022-11-25 22:17:42,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:17:42,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1043832779, now seen corresponding path program 1 times [2022-11-25 22:17:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:42,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285803763] [2022-11-25 22:17:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:17:42,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:42,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285803763] [2022-11-25 22:17:42,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285803763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:42,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:42,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:17:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639002652] [2022-11-25 22:17:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:42,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:17:42,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:17:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:42,682 INFO L87 Difference]: Start difference. First operand 1096 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 22:17:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:43,175 INFO L93 Difference]: Finished difference Result 1168 states and 1818 transitions. [2022-11-25 22:17:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:17:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-25 22:17:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:43,188 INFO L225 Difference]: With dead ends: 1168 [2022-11-25 22:17:43,188 INFO L226 Difference]: Without dead ends: 1153 [2022-11-25 22:17:43,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:17:43,192 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 608 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:43,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1279 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-25 22:17:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1100. [2022-11-25 22:17:43,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5361757105943152) internal successors, (1189), 830 states have internal predecessors, (1189), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-25 22:17:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1709 transitions. [2022-11-25 22:17:43,279 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1709 transitions. Word has length 69 [2022-11-25 22:17:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:43,279 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1709 transitions. [2022-11-25 22:17:43,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 22:17:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1709 transitions. [2022-11-25 22:17:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:17:43,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:43,283 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] [2022-11-25 22:17:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:17:43,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1258937169, now seen corresponding path program 1 times [2022-11-25 22:17:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:43,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519426259] [2022-11-25 22:17:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:43,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:17:43,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:43,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519426259] [2022-11-25 22:17:43,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519426259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:43,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:43,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:17:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166058860] [2022-11-25 22:17:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:43,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:17:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:17:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:43,646 INFO L87 Difference]: Start difference. First operand 1100 states and 1709 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-25 22:17:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:43,946 INFO L93 Difference]: Finished difference Result 1119 states and 1733 transitions. [2022-11-25 22:17:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:17:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-11-25 22:17:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:43,954 INFO L225 Difference]: With dead ends: 1119 [2022-11-25 22:17:43,954 INFO L226 Difference]: Without dead ends: 1104 [2022-11-25 22:17:43,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:17:43,956 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 257 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:43,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2550 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:17:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-25 22:17:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1100. [2022-11-25 22:17:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5322997416020672) internal successors, (1186), 830 states have internal predecessors, (1186), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-25 22:17:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1706 transitions. [2022-11-25 22:17:44,046 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1706 transitions. Word has length 74 [2022-11-25 22:17:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1706 transitions. [2022-11-25 22:17:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-25 22:17:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1706 transitions. [2022-11-25 22:17:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 22:17:44,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:44,048 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 22:17:44,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:17:44,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1953235180, now seen corresponding path program 1 times [2022-11-25 22:17:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:44,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334456855] [2022-11-25 22:17:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:44,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:17:44,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334456855] [2022-11-25 22:17:44,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334456855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:44,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:44,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530615236] [2022-11-25 22:17:44,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:44,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:44,157 INFO L87 Difference]: Start difference. First operand 1100 states and 1706 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:44,441 INFO L93 Difference]: Finished difference Result 3229 states and 5050 transitions. [2022-11-25 22:17:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:44,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-11-25 22:17:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:44,456 INFO L225 Difference]: With dead ends: 3229 [2022-11-25 22:17:44,456 INFO L226 Difference]: Without dead ends: 2145 [2022-11-25 22:17:44,461 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 [2022-11-25 22:17:44,464 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 473 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:44,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1049 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2022-11-25 22:17:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2104. [2022-11-25 22:17:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1508 states have (on average 1.539787798408488) internal successors, (2322), 1616 states have internal predecessors, (2322), 448 states have call successors, (448), 123 states have call predecessors, (448), 147 states have return successors, (517), 420 states have call predecessors, (517), 443 states have call successors, (517) [2022-11-25 22:17:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3287 transitions. [2022-11-25 22:17:44,641 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3287 transitions. Word has length 81 [2022-11-25 22:17:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:44,643 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3287 transitions. [2022-11-25 22:17:44,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3287 transitions. [2022-11-25 22:17:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:17:44,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:44,646 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:44,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:17:44,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -421157521, now seen corresponding path program 1 times [2022-11-25 22:17:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:44,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615550651] [2022-11-25 22:17:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:17:44,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:44,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615550651] [2022-11-25 22:17:44,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615550651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:44,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:44,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939540316] [2022-11-25 22:17:44,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:44,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:44,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:44,796 INFO L87 Difference]: Start difference. First operand 2104 states and 3287 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:45,168 INFO L93 Difference]: Finished difference Result 6240 states and 9836 transitions. [2022-11-25 22:17:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-25 22:17:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:45,256 INFO L225 Difference]: With dead ends: 6240 [2022-11-25 22:17:45,256 INFO L226 Difference]: Without dead ends: 4155 [2022-11-25 22:17:45,264 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 [2022-11-25 22:17:45,265 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 472 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:45,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1055 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2022-11-25 22:17:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 4113. [2022-11-25 22:17:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 2977 states have (on average 1.5418206247900572) internal successors, (4590), 3189 states have internal predecessors, (4590), 850 states have call successors, (850), 235 states have call predecessors, (850), 285 states have return successors, (1033), 782 states have call predecessors, (1033), 845 states have call successors, (1033) [2022-11-25 22:17:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 6473 transitions. [2022-11-25 22:17:45,637 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 6473 transitions. Word has length 82 [2022-11-25 22:17:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:45,638 INFO L495 AbstractCegarLoop]: Abstraction has 4113 states and 6473 transitions. [2022-11-25 22:17:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 6473 transitions. [2022-11-25 22:17:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:17:45,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:45,641 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 22:17:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:17:45,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash -171386442, now seen corresponding path program 1 times [2022-11-25 22:17:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:45,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059211130] [2022-11-25 22:17:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:45,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:17:45,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059211130] [2022-11-25 22:17:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059211130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:45,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:45,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818430627] [2022-11-25 22:17:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:45,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:45,797 INFO L87 Difference]: Start difference. First operand 4113 states and 6473 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:46,500 INFO L93 Difference]: Finished difference Result 12263 states and 19539 transitions. [2022-11-25 22:17:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-11-25 22:17:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:46,557 INFO L225 Difference]: With dead ends: 12263 [2022-11-25 22:17:46,557 INFO L226 Difference]: Without dead ends: 8175 [2022-11-25 22:17:46,579 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 [2022-11-25 22:17:46,580 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 471 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:46,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1061 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-11-25 22:17:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8132. [2022-11-25 22:17:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8132 states, 5916 states have (on average 1.5409060175794456) internal successors, (9116), 6336 states have internal predecessors, (9116), 1654 states have call successors, (1654), 459 states have call predecessors, (1654), 561 states have return successors, (2167), 1506 states have call predecessors, (2167), 1649 states have call successors, (2167) [2022-11-25 22:17:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8132 states to 8132 states and 12937 transitions. [2022-11-25 22:17:47,366 INFO L78 Accepts]: Start accepts. Automaton has 8132 states and 12937 transitions. Word has length 83 [2022-11-25 22:17:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:47,366 INFO L495 AbstractCegarLoop]: Abstraction has 8132 states and 12937 transitions. [2022-11-25 22:17:47,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8132 states and 12937 transitions. [2022-11-25 22:17:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 22:17:47,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:47,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:47,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:17:47,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash -694527213, now seen corresponding path program 1 times [2022-11-25 22:17:47,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668412026] [2022-11-25 22:17:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:17:47,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668412026] [2022-11-25 22:17:47,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668412026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:47,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:47,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:47,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080270270] [2022-11-25 22:17:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:47,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:47,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:47,472 INFO L87 Difference]: Start difference. First operand 8132 states and 12937 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:17:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:48,913 INFO L93 Difference]: Finished difference Result 24310 states and 39440 transitions. [2022-11-25 22:17:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:48,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-11-25 22:17:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:49,041 INFO L225 Difference]: With dead ends: 24310 [2022-11-25 22:17:49,042 INFO L226 Difference]: Without dead ends: 16215 [2022-11-25 22:17:49,080 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 [2022-11-25 22:17:49,081 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 470 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:49,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1067 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2022-11-25 22:17:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16171. [2022-11-25 22:17:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16171 states, 11795 states have (on average 1.538448495125053) internal successors, (18146), 12631 states have internal predecessors, (18146), 3262 states have call successors, (3262), 907 states have call predecessors, (3262), 1113 states have return successors, (4813), 2954 states have call predecessors, (4813), 3257 states have call successors, (4813) [2022-11-25 22:17:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 26221 transitions. [2022-11-25 22:17:50,503 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 26221 transitions. Word has length 87 [2022-11-25 22:17:50,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:50,503 INFO L495 AbstractCegarLoop]: Abstraction has 16171 states and 26221 transitions. [2022-11-25 22:17:50,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:17:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 26221 transitions. [2022-11-25 22:17:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 22:17:50,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:50,507 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 22:17:50,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:17:50,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1506450344, now seen corresponding path program 1 times [2022-11-25 22:17:50,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:50,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553272599] [2022-11-25 22:17:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:17:50,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:50,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553272599] [2022-11-25 22:17:50,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553272599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:50,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:50,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683080082] [2022-11-25 22:17:50,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:50,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:50,674 INFO L87 Difference]: Start difference. First operand 16171 states and 26221 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:51,866 INFO L93 Difference]: Finished difference Result 17221 states and 28012 transitions. [2022-11-25 22:17:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:51,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-11-25 22:17:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:51,989 INFO L225 Difference]: With dead ends: 17221 [2022-11-25 22:17:51,989 INFO L226 Difference]: Without dead ends: 17210 [2022-11-25 22:17:52,002 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 [2022-11-25 22:17:52,003 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 456 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:52,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1065 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17210 states. [2022-11-25 22:17:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17210 to 17167. [2022-11-25 22:17:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17167 states, 12522 states have (on average 1.537374221370388) internal successors, (19251), 13410 states have internal predecessors, (19251), 3463 states have call successors, (3463), 963 states have call predecessors, (3463), 1181 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-25 22:17:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17167 states to 17167 states and 27935 transitions. [2022-11-25 22:17:53,715 INFO L78 Accepts]: Start accepts. Automaton has 17167 states and 27935 transitions. Word has length 85 [2022-11-25 22:17:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:53,716 INFO L495 AbstractCegarLoop]: Abstraction has 17167 states and 27935 transitions. [2022-11-25 22:17:53,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:17:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17167 states and 27935 transitions. [2022-11-25 22:17:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 22:17:53,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:53,722 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-25 22:17:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:17:53,722 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash -252878320, now seen corresponding path program 1 times [2022-11-25 22:17:53,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:53,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863390589] [2022-11-25 22:17:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-25 22:17:53,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863390589] [2022-11-25 22:17:53,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863390589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313905715] [2022-11-25 22:17:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:53,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:53,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:53,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:53,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:17:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:17:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 22:17:54,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:54,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313905715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:54,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:54,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-25 22:17:54,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034276018] [2022-11-25 22:17:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:54,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:54,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:17:54,458 INFO L87 Difference]: Start difference. First operand 17167 states and 27935 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:17:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:55,916 INFO L93 Difference]: Finished difference Result 36306 states and 60697 transitions. [2022-11-25 22:17:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:17:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-11-25 22:17:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:56,022 INFO L225 Difference]: With dead ends: 36306 [2022-11-25 22:17:56,023 INFO L226 Difference]: Without dead ends: 19156 [2022-11-25 22:17:56,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:56,091 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 213 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:56,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1221 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:17:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19156 states. [2022-11-25 22:17:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19156 to 19156. [2022-11-25 22:17:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19156 states, 14460 states have (on average 1.5887966804979252) internal successors, (22974), 15348 states have internal predecessors, (22974), 3463 states have call successors, (3463), 1014 states have call predecessors, (3463), 1232 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-25 22:17:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19156 states to 19156 states and 31658 transitions. [2022-11-25 22:17:57,851 INFO L78 Accepts]: Start accepts. Automaton has 19156 states and 31658 transitions. Word has length 128 [2022-11-25 22:17:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:57,852 INFO L495 AbstractCegarLoop]: Abstraction has 19156 states and 31658 transitions. [2022-11-25 22:17:57,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:17:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 19156 states and 31658 transitions. [2022-11-25 22:17:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-25 22:17:57,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:57,858 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-25 22:17:57,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 22:17:58,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:17:58,066 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:17:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:58,067 INFO L85 PathProgramCache]: Analyzing trace with hash 289323624, now seen corresponding path program 1 times [2022-11-25 22:17:58,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:58,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589232350] [2022-11-25 22:17:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 22:17:59,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589232350] [2022-11-25 22:17:59,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589232350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303425678] [2022-11-25 22:17:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:59,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:59,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:17:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:17:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 22:18:00,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:18:00,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303425678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:00,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:18:00,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-25 22:18:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252354312] [2022-11-25 22:18:00,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:00,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:00,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:00,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:18:00,012 INFO L87 Difference]: Start difference. First operand 19156 states and 31658 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:18:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:01,473 INFO L93 Difference]: Finished difference Result 40284 states and 68092 transitions. [2022-11-25 22:18:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:18:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 133 [2022-11-25 22:18:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:01,736 INFO L225 Difference]: With dead ends: 40284 [2022-11-25 22:18:01,737 INFO L226 Difference]: Without dead ends: 21145 [2022-11-25 22:18:01,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:18:01,811 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 211 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:01,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:18:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21145 states. [2022-11-25 22:18:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21145 to 21145. [2022-11-25 22:18:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21145 states, 16398 states have (on average 1.6280643980973288) internal successors, (26697), 17286 states have internal predecessors, (26697), 3463 states have call successors, (3463), 1065 states have call predecessors, (3463), 1283 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-25 22:18:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21145 states to 21145 states and 35381 transitions. [2022-11-25 22:18:03,573 INFO L78 Accepts]: Start accepts. Automaton has 21145 states and 35381 transitions. Word has length 133 [2022-11-25 22:18:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:03,576 INFO L495 AbstractCegarLoop]: Abstraction has 21145 states and 35381 transitions. [2022-11-25 22:18:03,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:18:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21145 states and 35381 transitions. [2022-11-25 22:18:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:18:03,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:03,583 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-25 22:18:03,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:03,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:18:03,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -774046536, now seen corresponding path program 1 times [2022-11-25 22:18:03,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:03,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220670867] [2022-11-25 22:18:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:03,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 22:18:05,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:05,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220670867] [2022-11-25 22:18:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220670867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75168944] [2022-11-25 22:18:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:05,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:05,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:05,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:18:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:18:05,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:18:05,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:18:05,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75168944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:05,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:18:05,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-25 22:18:05,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096515579] [2022-11-25 22:18:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:05,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:18:05,718 INFO L87 Difference]: Start difference. First operand 21145 states and 35381 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:18:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:07,046 INFO L93 Difference]: Finished difference Result 44262 states and 75487 transitions. [2022-11-25 22:18:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:18:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 137 [2022-11-25 22:18:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:07,126 INFO L225 Difference]: With dead ends: 44262 [2022-11-25 22:18:07,126 INFO L226 Difference]: Without dead ends: 23134 [2022-11-25 22:18:07,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:18:07,180 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 209 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:07,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1221 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:18:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2022-11-25 22:18:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 23134. [2022-11-25 22:18:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 18336 states have (on average 1.6590314136125655) internal successors, (30420), 19224 states have internal predecessors, (30420), 3463 states have call successors, (3463), 1116 states have call predecessors, (3463), 1334 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-25 22:18:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 39104 transitions. [2022-11-25 22:18:08,579 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 39104 transitions. Word has length 137 [2022-11-25 22:18:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:08,580 INFO L495 AbstractCegarLoop]: Abstraction has 23134 states and 39104 transitions. [2022-11-25 22:18:08,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:18:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 39104 transitions. [2022-11-25 22:18:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-25 22:18:08,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:08,587 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-25 22:18:08,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:08,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1550730406, now seen corresponding path program 1 times [2022-11-25 22:18:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416096377] [2022-11-25 22:18:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-25 22:18:10,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416096377] [2022-11-25 22:18:10,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416096377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287501364] [2022-11-25 22:18:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:10,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:10,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:18:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:18:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 22:18:10,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:18:10,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287501364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:10,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:18:10,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-25 22:18:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496827707] [2022-11-25 22:18:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:10,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:10,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:18:10,976 INFO L87 Difference]: Start difference. First operand 23134 states and 39104 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:18:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:12,280 INFO L93 Difference]: Finished difference Result 48240 states and 82882 transitions. [2022-11-25 22:18:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:18:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2022-11-25 22:18:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:12,349 INFO L225 Difference]: With dead ends: 48240 [2022-11-25 22:18:12,350 INFO L226 Difference]: Without dead ends: 25123 [2022-11-25 22:18:12,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:18:12,401 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 207 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:12,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1221 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:18:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25123 states. [2022-11-25 22:18:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 25123. [2022-11-25 22:18:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25123 states, 20274 states have (on average 1.6840781296241492) internal successors, (34143), 21162 states have internal predecessors, (34143), 3463 states have call successors, (3463), 1167 states have call predecessors, (3463), 1385 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-25 22:18:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25123 states to 25123 states and 42827 transitions. [2022-11-25 22:18:13,762 INFO L78 Accepts]: Start accepts. Automaton has 25123 states and 42827 transitions. Word has length 140 [2022-11-25 22:18:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:13,763 INFO L495 AbstractCegarLoop]: Abstraction has 25123 states and 42827 transitions. [2022-11-25 22:18:13,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 22:18:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 25123 states and 42827 transitions. [2022-11-25 22:18:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-25 22:18:13,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:13,773 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:13,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 22:18:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:18:13,984 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 148101752, now seen corresponding path program 1 times [2022-11-25 22:18:13,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:13,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394586276] [2022-11-25 22:18:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 22:18:15,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394586276] [2022-11-25 22:18:15,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394586276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26209106] [2022-11-25 22:18:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:15,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:15,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:15,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:15,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:18:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:18:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-25 22:18:15,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:18:15,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26209106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:15,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:18:15,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-25 22:18:15,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106130199] [2022-11-25 22:18:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:15,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:15,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:18:15,966 INFO L87 Difference]: Start difference. First operand 25123 states and 42827 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:18:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:17,112 INFO L93 Difference]: Finished difference Result 51840 states and 89203 transitions. [2022-11-25 22:18:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:18:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 142 [2022-11-25 22:18:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:17,187 INFO L225 Difference]: With dead ends: 51840 [2022-11-25 22:18:17,187 INFO L226 Difference]: Without dead ends: 26779 [2022-11-25 22:18:17,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:18:17,221 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 286 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:17,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1327 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:18:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26779 states. [2022-11-25 22:18:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26779 to 26625. [2022-11-25 22:18:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26625 states, 21348 states have (on average 1.669289863219037) internal successors, (35636), 22239 states have internal predecessors, (35636), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-11-25 22:18:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26625 states to 26625 states and 46036 transitions. [2022-11-25 22:18:18,760 INFO L78 Accepts]: Start accepts. Automaton has 26625 states and 46036 transitions. Word has length 142 [2022-11-25 22:18:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:18,761 INFO L495 AbstractCegarLoop]: Abstraction has 26625 states and 46036 transitions. [2022-11-25 22:18:18,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:18:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26625 states and 46036 transitions. [2022-11-25 22:18:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-25 22:18:18,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:18,768 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:18,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:18:18,985 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash -95245040, now seen corresponding path program 1 times [2022-11-25 22:18:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:18,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891872070] [2022-11-25 22:18:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:18,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 22:18:20,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:20,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891872070] [2022-11-25 22:18:20,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891872070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380999777] [2022-11-25 22:18:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:20,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:20,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:20,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:20,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:18:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:18:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 22:18:20,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:18:20,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380999777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:18:20,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:18:20,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-25 22:18:20,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272044943] [2022-11-25 22:18:20,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:18:20,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:18:20,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:18:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:18:20,672 INFO L87 Difference]: Start difference. First operand 26625 states and 46036 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-25 22:18:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:21,767 INFO L93 Difference]: Finished difference Result 27958 states and 50408 transitions. [2022-11-25 22:18:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:18:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2022-11-25 22:18:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:21,911 INFO L225 Difference]: With dead ends: 27958 [2022-11-25 22:18:21,911 INFO L226 Difference]: Without dead ends: 27872 [2022-11-25 22:18:21,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:18:21,933 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 44 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:21,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1500 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:18:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27872 states. [2022-11-25 22:18:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27872 to 26785. [2022-11-25 22:18:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26785 states, 21508 states have (on average 1.6643109540636043) internal successors, (35796), 22399 states have internal predecessors, (35796), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-11-25 22:18:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 46196 transitions. [2022-11-25 22:18:23,589 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 46196 transitions. Word has length 145 [2022-11-25 22:18:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:23,590 INFO L495 AbstractCegarLoop]: Abstraction has 26785 states and 46196 transitions. [2022-11-25 22:18:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-25 22:18:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 46196 transitions. [2022-11-25 22:18:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-25 22:18:23,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:23,769 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:18:23,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:18:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:23,976 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:18:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:23,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1669981693, now seen corresponding path program 1 times [2022-11-25 22:18:23,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:23,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655979543] [2022-11-25 22:18:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 22:18:25,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655979543] [2022-11-25 22:18:25,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655979543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692417348] [2022-11-25 22:18:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:25,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:25,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:25,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:25,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c3e84cb-fca6-491d-8c58-8652fb13fbb1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:18:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:25,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 22:18:25,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-25 22:18:26,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:29,920 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...