./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/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_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/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_87aa6c64-d415-4f5f-bd59-633886d3bf2f/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 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f --- 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 [2022-11-26 00:10:20,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:10:20,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:10:20,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:10:20,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:10:20,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:10:20,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:10:20,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:10:20,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:10:20,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:10:20,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:10:20,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:10:20,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:10:20,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:10:20,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:10:20,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:10:20,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:10:20,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:10:20,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:10:20,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:10:20,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:10:20,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:10:20,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:10:20,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:10:20,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:10:20,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:10:20,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:10:20,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:10:20,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:10:20,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:10:20,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:10:20,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:10:20,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:10:20,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:10:20,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:10:20,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:10:20,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:10:20,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:10:20,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:10:20,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:10:20,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:10:20,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:10:20,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:10:20,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:10:20,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:10:20,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:10:20,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:10:20,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:10:20,412 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:10:20,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:10:20,412 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:10:20,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:10:20,413 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:10:20,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:10:20,414 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:10:20,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:10:20,414 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:10:20,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:10:20,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:10:20,415 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:10:20,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:10:20,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:10:20,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:10:20,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:10:20,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:10:20,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:10:20,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:10:20,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:10:20,418 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:10:20,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:10:20,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:10:20,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:10:20,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:10:20,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:10:20,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:10:20,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:10:20,419 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:10:20,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:10:20,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:10:20,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:10:20,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:10:20,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:10:20,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:10:20,421 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_87aa6c64-d415-4f5f-bd59-633886d3bf2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f [2022-11-26 00:10:20,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:10:20,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:10:20,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:10:20,719 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:10:20,719 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:10:20,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2022-11-26 00:10:23,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:10:24,191 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:10:24,192 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2022-11-26 00:10:24,213 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/data/38cf37e7b/039d9e1a11bb4278a183d90b0e631058/FLAG7ecca2920 [2022-11-26 00:10:24,228 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/data/38cf37e7b/039d9e1a11bb4278a183d90b0e631058 [2022-11-26 00:10:24,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:10:24,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:10:24,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:10:24,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:10:24,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:10:24,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:10:24" (1/1) ... [2022-11-26 00:10:24,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c85bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:24, skipping insertion in model container [2022-11-26 00:10:24,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:10:24" (1/1) ... [2022-11-26 00:10:24,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:10:24,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:10:24,672 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_87aa6c64-d415-4f5f-bd59-633886d3bf2f/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2022-11-26 00:10:24,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:10:24,910 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:10:24,968 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_87aa6c64-d415-4f5f-bd59-633886d3bf2f/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2022-11-26 00:10:25,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:10:25,082 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:10:25,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25 WrapperNode [2022-11-26 00:10:25,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:10:25,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:10:25,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:10:25,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:10:25,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,173 INFO L138 Inliner]: procedures = 92, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1071 [2022-11-26 00:10:25,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:10:25,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:10:25,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:10:25,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:10:25,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,251 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:10:25,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:10:25,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:10:25,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:10:25,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (1/1) ... [2022-11-26 00:10:25,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:10:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:25,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:10:25,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:10:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:10:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:10:25,390 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:10:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:10:25,390 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:10:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:10:25,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:10:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:10:25,391 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:10:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:10:25,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:10:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:10:25,391 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:10:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:10:25,392 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:10:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-26 00:10:25,392 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-26 00:10:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:10:25,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:10:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:10:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:10:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:10:25,394 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:10:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:10:25,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:10:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:10:25,395 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:10:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:10:25,396 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:10:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:10:25,396 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:10:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:10:25,396 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:10:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:10:25,397 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:10:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:10:25,397 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:10:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-26 00:10:25,398 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-26 00:10:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:10:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:10:25,399 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:10:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:10:25,399 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:10:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:10:25,399 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:10:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:10:25,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:10:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:10:25,401 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:10:25,676 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:10:25,678 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:10:26,813 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:10:27,593 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:10:27,593 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:10:27,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:10:27 BoogieIcfgContainer [2022-11-26 00:10:27,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:10:27,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:10:27,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:10:27,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:10:27,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:10:24" (1/3) ... [2022-11-26 00:10:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5169b695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:10:27, skipping insertion in model container [2022-11-26 00:10:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:10:25" (2/3) ... [2022-11-26 00:10:27,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5169b695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:10:27, skipping insertion in model container [2022-11-26 00:10:27,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:10:27" (3/3) ... [2022-11-26 00:10:27,613 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product03.cil.c [2022-11-26 00:10:27,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:10:27,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:10:27,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:10:27,726 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;@62996f76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:10:27,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:10:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-26 00:10:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 00:10:27,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:27,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:10:27,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash -22457928, now seen corresponding path program 1 times [2022-11-26 00:10:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545086437] [2022-11-26 00:10:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:10:28,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:28,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545086437] [2022-11-26 00:10:28,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545086437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:28,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:28,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:10:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544620692] [2022-11-26 00:10:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:28,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:10:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:10:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:10:28,411 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:10:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:28,629 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2022-11-26 00:10:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:10:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2022-11-26 00:10:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:28,652 INFO L225 Difference]: With dead ends: 386 [2022-11-26 00:10:28,653 INFO L226 Difference]: Without dead ends: 364 [2022-11-26 00:10:28,656 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 [2022-11-26 00:10:28,660 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:28,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:10:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-26 00:10:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-11-26 00:10:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-26 00:10:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2022-11-26 00:10:28,770 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 76 [2022-11-26 00:10:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:28,772 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2022-11-26 00:10:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:10:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2022-11-26 00:10:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:10:28,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:28,779 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:10:28,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:10:28,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1412848271, now seen corresponding path program 1 times [2022-11-26 00:10:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:28,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837470773] [2022-11-26 00:10:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:10:29,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837470773] [2022-11-26 00:10:29,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837470773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:29,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:10:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593577432] [2022-11-26 00:10:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:10:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:10:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:10:29,392 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 00:10:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:32,638 INFO L93 Difference]: Finished difference Result 1248 states and 2004 transitions. [2022-11-26 00:10:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:10:32,639 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 77 [2022-11-26 00:10:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:32,652 INFO L225 Difference]: With dead ends: 1248 [2022-11-26 00:10:32,653 INFO L226 Difference]: Without dead ends: 900 [2022-11-26 00:10:32,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:10:32,668 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1949 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:32,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 2137 Invalid, 3544 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [577 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 00:10:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-11-26 00:10:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 842. [2022-11-26 00:10:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 591 states have (on average 1.6125211505922166) internal successors, (953), 626 states have internal predecessors, (953), 201 states have call successors, (201), 47 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-11-26 00:10:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1356 transitions. [2022-11-26 00:10:32,780 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1356 transitions. Word has length 77 [2022-11-26 00:10:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:32,782 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1356 transitions. [2022-11-26 00:10:32,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 00:10:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1356 transitions. [2022-11-26 00:10:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:10:32,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:32,786 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-26 00:10:32,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:10:32,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2043519656, now seen corresponding path program 1 times [2022-11-26 00:10:32,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:32,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547084184] [2022-11-26 00:10:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:10:33,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:33,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547084184] [2022-11-26 00:10:33,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547084184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:33,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:33,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:10:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894774555] [2022-11-26 00:10:33,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:33,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:10:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:10:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:10:33,204 INFO L87 Difference]: Start difference. First operand 842 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-26 00:10:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:35,670 INFO L93 Difference]: Finished difference Result 1469 states and 2367 transitions. [2022-11-26 00:10:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:10:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-11-26 00:10:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:35,676 INFO L225 Difference]: With dead ends: 1469 [2022-11-26 00:10:35,677 INFO L226 Difference]: Without dead ends: 967 [2022-11-26 00:10:35,686 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 [2022-11-26 00:10:35,690 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:35,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1606 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-26 00:10:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-26 00:10:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 858. [2022-11-26 00:10:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 601 states have (on average 1.605657237936772) internal successors, (965), 639 states have internal predecessors, (965), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-26 00:10:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1378 transitions. [2022-11-26 00:10:35,761 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1378 transitions. Word has length 78 [2022-11-26 00:10:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:35,761 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1378 transitions. [2022-11-26 00:10:35,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-26 00:10:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1378 transitions. [2022-11-26 00:10:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:10:35,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:35,764 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-26 00:10:35,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:10:35,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:35,765 INFO L85 PathProgramCache]: Analyzing trace with hash -623604157, now seen corresponding path program 1 times [2022-11-26 00:10:35,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:35,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936817377] [2022-11-26 00:10:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:35,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:10:36,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:36,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936817377] [2022-11-26 00:10:36,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936817377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:36,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:36,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:10:36,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574623497] [2022-11-26 00:10:36,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:10:36,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:10:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:10:36,106 INFO L87 Difference]: Start difference. First operand 858 states and 1378 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-26 00:10:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:36,764 INFO L93 Difference]: Finished difference Result 929 states and 1490 transitions. [2022-11-26 00:10:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:36,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-26 00:10:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:36,772 INFO L225 Difference]: With dead ends: 929 [2022-11-26 00:10:36,772 INFO L226 Difference]: Without dead ends: 914 [2022-11-26 00:10:36,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:10:36,774 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 670 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:36,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1800 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:10:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-11-26 00:10:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 862. [2022-11-26 00:10:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 605 states have (on average 1.6016528925619835) internal successors, (969), 643 states have internal predecessors, (969), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-26 00:10:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1382 transitions. [2022-11-26 00:10:36,848 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1382 transitions. Word has length 82 [2022-11-26 00:10:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:36,849 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1382 transitions. [2022-11-26 00:10:36,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-26 00:10:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1382 transitions. [2022-11-26 00:10:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:10:36,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:36,852 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-26 00:10:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:10:36,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 698247476, now seen corresponding path program 1 times [2022-11-26 00:10:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:36,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477639094] [2022-11-26 00:10:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:10:37,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:37,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477639094] [2022-11-26 00:10:37,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477639094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:37,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:37,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:10:37,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868842441] [2022-11-26 00:10:37,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:10:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:10:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:37,050 INFO L87 Difference]: Start difference. First operand 862 states and 1382 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-26 00:10:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:37,216 INFO L93 Difference]: Finished difference Result 881 states and 1406 transitions. [2022-11-26 00:10:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:10:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-11-26 00:10:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:37,223 INFO L225 Difference]: With dead ends: 881 [2022-11-26 00:10:37,223 INFO L226 Difference]: Without dead ends: 866 [2022-11-26 00:10:37,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:10:37,225 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:37,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2146 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:10:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-11-26 00:10:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 862. [2022-11-26 00:10:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 605 states have (on average 1.5983471074380164) internal successors, (967), 643 states have internal predecessors, (967), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-26 00:10:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1380 transitions. [2022-11-26 00:10:37,292 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1380 transitions. Word has length 87 [2022-11-26 00:10:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:37,292 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1380 transitions. [2022-11-26 00:10:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-26 00:10:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1380 transitions. [2022-11-26 00:10:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:10:37,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:37,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:10:37,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:10:37,320 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1812553363, now seen corresponding path program 1 times [2022-11-26 00:10:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:37,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916323662] [2022-11-26 00:10:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:10:37,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:37,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916323662] [2022-11-26 00:10:37,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916323662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:37,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:37,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:10:37,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713020890] [2022-11-26 00:10:37,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:37,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:37,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:37,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:37,591 INFO L87 Difference]: Start difference. First operand 862 states and 1380 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:39,217 INFO L93 Difference]: Finished difference Result 2747 states and 4463 transitions. [2022-11-26 00:10:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-26 00:10:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:39,234 INFO L225 Difference]: With dead ends: 2747 [2022-11-26 00:10:39,235 INFO L226 Difference]: Without dead ends: 1901 [2022-11-26 00:10:39,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:39,244 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1148 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:39,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 706 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:10:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-11-26 00:10:39,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1735. [2022-11-26 00:10:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1239 states have (on average 1.6069410815173526) internal successors, (1991), 1312 states have internal predecessors, (1991), 393 states have call successors, (393), 91 states have call predecessors, (393), 102 states have return successors, (423), 367 states have call predecessors, (423), 388 states have call successors, (423) [2022-11-26 00:10:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2807 transitions. [2022-11-26 00:10:39,399 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2807 transitions. Word has length 94 [2022-11-26 00:10:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:39,400 INFO L495 AbstractCegarLoop]: Abstraction has 1735 states and 2807 transitions. [2022-11-26 00:10:39,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2807 transitions. [2022-11-26 00:10:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-26 00:10:39,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:39,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:10:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:10:39,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash -354714150, now seen corresponding path program 1 times [2022-11-26 00:10:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:39,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594653897] [2022-11-26 00:10:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:10:39,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594653897] [2022-11-26 00:10:39,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594653897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:39,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:39,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:10:39,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806799792] [2022-11-26 00:10:39,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:39,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:39,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:39,636 INFO L87 Difference]: Start difference. First operand 1735 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:41,403 INFO L93 Difference]: Finished difference Result 5298 states and 8687 transitions. [2022-11-26 00:10:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-11-26 00:10:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:41,431 INFO L225 Difference]: With dead ends: 5298 [2022-11-26 00:10:41,431 INFO L226 Difference]: Without dead ends: 3582 [2022-11-26 00:10:41,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:41,442 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1139 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:41,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 710 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:10:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-11-26 00:10:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3369. [2022-11-26 00:10:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2429 states have (on average 1.6130094689172498) internal successors, (3918), 2579 states have internal predecessors, (3918), 736 states have call successors, (736), 173 states have call predecessors, (736), 203 states have return successors, (838), 678 states have call predecessors, (838), 731 states have call successors, (838) [2022-11-26 00:10:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 5492 transitions. [2022-11-26 00:10:41,769 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 5492 transitions. Word has length 95 [2022-11-26 00:10:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:41,769 INFO L495 AbstractCegarLoop]: Abstraction has 3369 states and 5492 transitions. [2022-11-26 00:10:41,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 5492 transitions. [2022-11-26 00:10:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:10:41,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:41,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:10:41,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:10:41,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1888632399, now seen corresponding path program 1 times [2022-11-26 00:10:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204101281] [2022-11-26 00:10:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:10:42,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:42,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204101281] [2022-11-26 00:10:42,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204101281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:42,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:42,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:10:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389623239] [2022-11-26 00:10:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:42,066 INFO L87 Difference]: Start difference. First operand 3369 states and 5492 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:44,023 INFO L93 Difference]: Finished difference Result 10242 states and 17011 transitions. [2022-11-26 00:10:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-11-26 00:10:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:44,079 INFO L225 Difference]: With dead ends: 10242 [2022-11-26 00:10:44,079 INFO L226 Difference]: Without dead ends: 6898 [2022-11-26 00:10:44,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:44,102 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1122 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:44,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 723 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:10:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2022-11-26 00:10:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6582. [2022-11-26 00:10:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6582 states, 4764 states have (on average 1.6133501259445844) internal successors, (7686), 5074 states have internal predecessors, (7686), 1406 states have call successors, (1406), 337 states have call predecessors, (1406), 411 states have return successors, (1744), 1284 states have call predecessors, (1744), 1401 states have call successors, (1744) [2022-11-26 00:10:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6582 states to 6582 states and 10836 transitions. [2022-11-26 00:10:44,793 INFO L78 Accepts]: Start accepts. Automaton has 6582 states and 10836 transitions. Word has length 96 [2022-11-26 00:10:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:44,793 INFO L495 AbstractCegarLoop]: Abstraction has 6582 states and 10836 transitions. [2022-11-26 00:10:44,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6582 states and 10836 transitions. [2022-11-26 00:10:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-26 00:10:44,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:44,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:10:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:10:44,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1582064708, now seen corresponding path program 1 times [2022-11-26 00:10:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089370021] [2022-11-26 00:10:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:10:45,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089370021] [2022-11-26 00:10:45,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089370021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:45,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:45,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:10:45,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894764845] [2022-11-26 00:10:45,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:45,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:45,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:45,032 INFO L87 Difference]: Start difference. First operand 6582 states and 10836 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:47,729 INFO L93 Difference]: Finished difference Result 19983 states and 33946 transitions. [2022-11-26 00:10:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2022-11-26 00:10:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:47,846 INFO L225 Difference]: With dead ends: 19983 [2022-11-26 00:10:47,846 INFO L226 Difference]: Without dead ends: 13438 [2022-11-26 00:10:47,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:47,885 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1109 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:47,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 735 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:10:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2022-11-26 00:10:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 12907. [2022-11-26 00:10:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12907 states, 9351 states have (on average 1.6107368195914875) internal successors, (15062), 9993 states have internal predecessors, (15062), 2716 states have call successors, (2716), 665 states have call predecessors, (2716), 839 states have return successors, (3854), 2466 states have call predecessors, (3854), 2711 states have call successors, (3854) [2022-11-26 00:10:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12907 states to 12907 states and 21632 transitions. [2022-11-26 00:10:49,454 INFO L78 Accepts]: Start accepts. Automaton has 12907 states and 21632 transitions. Word has length 97 [2022-11-26 00:10:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:49,455 INFO L495 AbstractCegarLoop]: Abstraction has 12907 states and 21632 transitions. [2022-11-26 00:10:49,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12907 states and 21632 transitions. [2022-11-26 00:10:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:10:49,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:49,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 00:10:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:10:49,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1799488719, now seen corresponding path program 1 times [2022-11-26 00:10:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558056149] [2022-11-26 00:10:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:10:49,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:49,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558056149] [2022-11-26 00:10:49,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558056149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:49,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:49,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:10:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793298454] [2022-11-26 00:10:49,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:49,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:49,675 INFO L87 Difference]: Start difference. First operand 12907 states and 21632 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:53,079 INFO L93 Difference]: Finished difference Result 39256 states and 69522 transitions. [2022-11-26 00:10:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2022-11-26 00:10:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:53,269 INFO L225 Difference]: With dead ends: 39256 [2022-11-26 00:10:53,269 INFO L226 Difference]: Without dead ends: 26400 [2022-11-26 00:10:53,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:53,344 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1100 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:53,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 749 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:10:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26400 states. [2022-11-26 00:10:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26400 to 25328. [2022-11-26 00:10:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25328 states, 18381 states have (on average 1.609760078341766) internal successors, (29589), 19665 states have internal predecessors, (29589), 5276 states have call successors, (5276), 1319 states have call predecessors, (5276), 1670 states have return successors, (8905), 4769 states have call predecessors, (8905), 5271 states have call successors, (8905) [2022-11-26 00:10:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25328 states to 25328 states and 43770 transitions. [2022-11-26 00:10:56,167 INFO L78 Accepts]: Start accepts. Automaton has 25328 states and 43770 transitions. Word has length 98 [2022-11-26 00:10:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:56,170 INFO L495 AbstractCegarLoop]: Abstraction has 25328 states and 43770 transitions. [2022-11-26 00:10:56,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 00:10:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25328 states and 43770 transitions. [2022-11-26 00:10:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 00:10:56,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:56,178 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-26 00:10:56,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:10:56,179 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2030100833, now seen corresponding path program 1 times [2022-11-26 00:10:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421794611] [2022-11-26 00:10:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:10:56,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421794611] [2022-11-26 00:10:56,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421794611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:56,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:56,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:10:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083873825] [2022-11-26 00:10:56,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:56,393 INFO L87 Difference]: Start difference. First operand 25328 states and 43770 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, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 00:10:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:58,728 INFO L93 Difference]: Finished difference Result 54299 states and 97351 transitions. [2022-11-26 00:10:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:10:58,729 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, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-26 00:10:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:58,900 INFO L225 Difference]: With dead ends: 54299 [2022-11-26 00:10:58,900 INFO L226 Difference]: Without dead ends: 28988 [2022-11-26 00:10:59,006 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 [2022-11-26 00:10:59,007 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 123 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:59,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1715 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:10:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28988 states. [2022-11-26 00:11:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28988 to 25568. [2022-11-26 00:11:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 18604 states have (on average 1.6049774242098473) internal successors, (29859), 19872 states have internal predecessors, (29859), 5293 states have call successors, (5293), 1319 states have call predecessors, (5293), 1670 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-26 00:11:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 44074 transitions. [2022-11-26 00:11:01,629 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 44074 transitions. Word has length 142 [2022-11-26 00:11:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:01,630 INFO L495 AbstractCegarLoop]: Abstraction has 25568 states and 44074 transitions. [2022-11-26 00:11:01,630 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, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 00:11:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 44074 transitions. [2022-11-26 00:11:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-26 00:11:01,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:01,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:01,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:11:01,641 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:01,642 INFO L85 PathProgramCache]: Analyzing trace with hash 202313354, now seen corresponding path program 1 times [2022-11-26 00:11:01,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:01,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210523015] [2022-11-26 00:11:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:01,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-26 00:11:01,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:01,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210523015] [2022-11-26 00:11:01,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210523015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658814425] [2022-11-26 00:11:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:01,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:01,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:01,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:01,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:11:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:11:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:11:02,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:02,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658814425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:02,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:02,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:11:02,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741395697] [2022-11-26 00:11:02,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:02,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:02,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:02,473 INFO L87 Difference]: Start difference. First operand 25568 states and 44074 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:05,479 INFO L93 Difference]: Finished difference Result 53615 states and 95734 transitions. [2022-11-26 00:11:05,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:11:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 145 [2022-11-26 00:11:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:05,626 INFO L225 Difference]: With dead ends: 53615 [2022-11-26 00:11:05,627 INFO L226 Difference]: Without dead ends: 28064 [2022-11-26 00:11:05,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:11:05,760 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 213 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:05,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1407 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:11:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28064 states. [2022-11-26 00:11:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28064 to 28064. [2022-11-26 00:11:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28064 states, 21036 states have (on average 1.6415193002471953) internal successors, (34531), 22304 states have internal predecessors, (34531), 5293 states have call successors, (5293), 1383 states have call predecessors, (5293), 1734 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-26 00:11:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28064 states to 28064 states and 48746 transitions. [2022-11-26 00:11:08,901 INFO L78 Accepts]: Start accepts. Automaton has 28064 states and 48746 transitions. Word has length 145 [2022-11-26 00:11:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:08,902 INFO L495 AbstractCegarLoop]: Abstraction has 28064 states and 48746 transitions. [2022-11-26 00:11:08,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 28064 states and 48746 transitions. [2022-11-26 00:11:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 00:11:08,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:08,910 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:08,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:09,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:11:09,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash 607829302, now seen corresponding path program 1 times [2022-11-26 00:11:09,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:09,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747485128] [2022-11-26 00:11:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:09,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 00:11:09,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747485128] [2022-11-26 00:11:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747485128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366545392] [2022-11-26 00:11:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:09,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:09,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:09,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:11:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:11:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 00:11:09,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:09,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366545392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:09,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:09,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:11:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778639705] [2022-11-26 00:11:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:09,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:09,786 INFO L87 Difference]: Start difference. First operand 28064 states and 48746 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:12,218 INFO L93 Difference]: Finished difference Result 58607 states and 105012 transitions. [2022-11-26 00:11:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:11:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 150 [2022-11-26 00:11:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:12,352 INFO L225 Difference]: With dead ends: 58607 [2022-11-26 00:11:12,352 INFO L226 Difference]: Without dead ends: 30560 [2022-11-26 00:11:12,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:11:12,460 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 211 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:12,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1407 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:11:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30560 states. [2022-11-26 00:11:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30560 to 30560. [2022-11-26 00:11:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30560 states, 23468 states have (on average 1.67048747230271) internal successors, (39203), 24736 states have internal predecessors, (39203), 5293 states have call successors, (5293), 1447 states have call predecessors, (5293), 1798 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-26 00:11:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30560 states to 30560 states and 53418 transitions. [2022-11-26 00:11:14,789 INFO L78 Accepts]: Start accepts. Automaton has 30560 states and 53418 transitions. Word has length 150 [2022-11-26 00:11:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:14,789 INFO L495 AbstractCegarLoop]: Abstraction has 30560 states and 53418 transitions. [2022-11-26 00:11:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 30560 states and 53418 transitions. [2022-11-26 00:11:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-26 00:11:14,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:14,799 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:14,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:15,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:11:15,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash -916472458, now seen corresponding path program 1 times [2022-11-26 00:11:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156259054] [2022-11-26 00:11:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-26 00:11:15,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:15,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156259054] [2022-11-26 00:11:15,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156259054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:15,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341269345] [2022-11-26 00:11:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:15,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:15,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:15,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:15,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:11:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:11:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:11:15,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:15,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341269345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:15,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:15,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:11:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553095930] [2022-11-26 00:11:15,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:11:15,697 INFO L87 Difference]: Start difference. First operand 30560 states and 53418 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:18,092 INFO L93 Difference]: Finished difference Result 63599 states and 114290 transitions. [2022-11-26 00:11:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:11:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 154 [2022-11-26 00:11:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:18,231 INFO L225 Difference]: With dead ends: 63599 [2022-11-26 00:11:18,231 INFO L226 Difference]: Without dead ends: 33056 [2022-11-26 00:11:18,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:11:18,331 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 209 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:18,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1407 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:11:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33056 states. [2022-11-26 00:11:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33056 to 33056. [2022-11-26 00:11:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33056 states, 25900 states have (on average 1.694015444015444) internal successors, (43875), 27168 states have internal predecessors, (43875), 5293 states have call successors, (5293), 1511 states have call predecessors, (5293), 1862 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-26 00:11:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33056 states to 33056 states and 58090 transitions. [2022-11-26 00:11:20,705 INFO L78 Accepts]: Start accepts. Automaton has 33056 states and 58090 transitions. Word has length 154 [2022-11-26 00:11:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:20,706 INFO L495 AbstractCegarLoop]: Abstraction has 33056 states and 58090 transitions. [2022-11-26 00:11:20,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 33056 states and 58090 transitions. [2022-11-26 00:11:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-26 00:11:20,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:20,718 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:20,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:20,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:11:20,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash -759326038, now seen corresponding path program 1 times [2022-11-26 00:11:20,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:20,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343591907] [2022-11-26 00:11:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 00:11:23,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:23,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343591907] [2022-11-26 00:11:23,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343591907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:23,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005335763] [2022-11-26 00:11:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:23,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87aa6c64-d415-4f5f-bd59-633886d3bf2f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:11:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:11:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 00:11:24,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:24,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005335763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:24,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:11:24,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-11-26 00:11:24,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129697149] [2022-11-26 00:11:24,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:11:24,363 INFO L87 Difference]: Start difference. First operand 33056 states and 58090 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 00:11:26,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:26,382 INFO L93 Difference]: Finished difference Result 68591 states and 123568 transitions. [2022-11-26 00:11:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:11:26,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 157 [2022-11-26 00:11:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:26,541 INFO L225 Difference]: With dead ends: 68591 [2022-11-26 00:11:26,541 INFO L226 Difference]: Without dead ends: 35552 [2022-11-26 00:11:26,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:11:26,661 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 207 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:26,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1407 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:11:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35552 states.