./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI --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 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 --- 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-5e519f3 [2022-11-03 03:48:19,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:48:19,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:48:19,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:48:19,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:48:19,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:48:19,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:48:19,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:48:19,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:48:19,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:48:19,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:48:19,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:48:19,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:48:19,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:48:19,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:48:19,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:48:19,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:48:19,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:48:19,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:48:19,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:48:19,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:48:19,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:48:19,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:48:19,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:48:19,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:48:19,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:48:19,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:48:19,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:48:19,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:48:19,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:48:19,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:48:19,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:48:19,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:48:19,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:48:19,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:48:19,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:48:19,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:48:19,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:48:19,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:48:19,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:48:19,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:48:19,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:48:19,461 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:48:19,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:48:19,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:48:19,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:48:19,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:48:19,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:48:19,464 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:48:19,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:48:19,464 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:48:19,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:48:19,465 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:48:19,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:48:19,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:48:19,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:48:19,466 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:48:19,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:48:19,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:48:19,467 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:48:19,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:48:19,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:48:19,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:48:19,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:48:19,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:48:19,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:48:19,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:48:19,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:48:19,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:48:19,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:48:19,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:48:19,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:48:19,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:48:19,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:48:19,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:48:19,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:48:19,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:48:19,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:48:19,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:48:19,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:48:19,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:48:19,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:48:19,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:48:19,473 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_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940a677bfde7dbbc79e036121bd0ec6fd3518c0f58a02d336e5d42fafb098792 [2022-11-03 03:48:19,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:48:19,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:48:19,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:48:19,791 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:48:19,792 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:48:19,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-11-03 03:48:19,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/data/877ca5aed/7a6da8b5766645498bebaeab4b61af9e/FLAG0b91ee943 [2022-11-03 03:48:20,337 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:48:20,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/sv-benchmarks/c/systemc/transmitter.11.cil.c [2022-11-03 03:48:20,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/data/877ca5aed/7a6da8b5766645498bebaeab4b61af9e/FLAG0b91ee943 [2022-11-03 03:48:20,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/data/877ca5aed/7a6da8b5766645498bebaeab4b61af9e [2022-11-03 03:48:20,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:48:20,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:48:20,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:48:20,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:48:20,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:48:20,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:48:20" (1/1) ... [2022-11-03 03:48:20,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f265db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:20, skipping insertion in model container [2022-11-03 03:48:20,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:48:20" (1/1) ... [2022-11-03 03:48:20,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:48:20,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:48:21,057 WARN L230 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_088616ce-2951-417c-91c6-3476b5860f73/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-11-03 03:48:21,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:48:21,235 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:48:21,246 WARN L230 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_088616ce-2951-417c-91c6-3476b5860f73/sv-benchmarks/c/systemc/transmitter.11.cil.c[706,719] [2022-11-03 03:48:21,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:48:21,340 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:48:21,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21 WrapperNode [2022-11-03 03:48:21,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:48:21,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:48:21,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:48:21,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:48:21,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,406 INFO L138 Inliner]: procedures = 50, calls = 63, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 777 [2022-11-03 03:48:21,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:48:21,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:48:21,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:48:21,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:48:21,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:48:21,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:48:21,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:48:21,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:48:21,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (1/1) ... [2022-11-03 03:48:21,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:48:21,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:21,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:48:21,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_088616ce-2951-417c-91c6-3476b5860f73/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:48:21,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:48:21,576 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 03:48:21,577 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 03:48:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:48:21,577 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:48:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 03:48:21,578 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 03:48:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 03:48:21,578 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 03:48:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 03:48:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 03:48:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 03:48:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 03:48:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:48:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:48:21,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:48:21,744 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:48:21,746 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:48:22,745 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:48:23,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:48:23,303 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 03:48:23,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:23 BoogieIcfgContainer [2022-11-03 03:48:23,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:48:23,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:48:23,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:48:23,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:48:23,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:48:20" (1/3) ... [2022-11-03 03:48:23,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a05f176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:23, skipping insertion in model container [2022-11-03 03:48:23,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:21" (2/3) ... [2022-11-03 03:48:23,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a05f176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:23, skipping insertion in model container [2022-11-03 03:48:23,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:23" (3/3) ... [2022-11-03 03:48:23,318 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.11.cil.c [2022-11-03 03:48:23,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:48:23,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:48:23,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:48:23,431 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;@48f65648, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:48:23,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:48:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-03 03:48:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:23,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:23,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:23,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash 626698193, now seen corresponding path program 1 times [2022-11-03 03:48:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563775842] [2022-11-03 03:48:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:23,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563775842] [2022-11-03 03:48:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563775842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:23,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:23,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:24,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307395782] [2022-11-03 03:48:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:24,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:24,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:24,038 INFO L87 Difference]: Start difference. First operand has 175 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 145 states have internal predecessors, (223), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:24,579 INFO L93 Difference]: Finished difference Result 512 states and 807 transitions. [2022-11-03 03:48:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:48:24,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:24,603 INFO L225 Difference]: With dead ends: 512 [2022-11-03 03:48:24,603 INFO L226 Difference]: Without dead ends: 338 [2022-11-03 03:48:24,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:24,623 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 474 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:24,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 746 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:48:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-03 03:48:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2022-11-03 03:48:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 277 states have (on average 1.51985559566787) internal successors, (421), 279 states have internal predecessors, (421), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 03:48:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 509 transitions. [2022-11-03 03:48:24,699 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 509 transitions. Word has length 73 [2022-11-03 03:48:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:24,699 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 509 transitions. [2022-11-03 03:48:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 509 transitions. [2022-11-03 03:48:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:24,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:24,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:48:24,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1203626834, now seen corresponding path program 1 times [2022-11-03 03:48:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:24,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870740034] [2022-11-03 03:48:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:25,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:25,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870740034] [2022-11-03 03:48:25,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870740034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:25,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:25,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666114549] [2022-11-03 03:48:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:25,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:25,047 INFO L87 Difference]: Start difference. First operand 334 states and 509 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:26,166 INFO L93 Difference]: Finished difference Result 1945 states and 3133 transitions. [2022-11-03 03:48:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:48:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:26,195 INFO L225 Difference]: With dead ends: 1945 [2022-11-03 03:48:26,195 INFO L226 Difference]: Without dead ends: 1616 [2022-11-03 03:48:26,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:26,206 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 1115 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:26,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1214 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:48:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-03 03:48:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1580. [2022-11-03 03:48:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1327 states have (on average 1.5169555388093443) internal successors, (2013), 1335 states have internal predecessors, (2013), 192 states have call successors, (192), 60 states have call predecessors, (192), 60 states have return successors, (298), 185 states have call predecessors, (298), 192 states have call successors, (298) [2022-11-03 03:48:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2503 transitions. [2022-11-03 03:48:26,403 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2503 transitions. Word has length 73 [2022-11-03 03:48:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:26,405 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2503 transitions. [2022-11-03 03:48:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2503 transitions. [2022-11-03 03:48:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:26,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:26,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:48:26,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1443894163, now seen corresponding path program 1 times [2022-11-03 03:48:26,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:26,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745650891] [2022-11-03 03:48:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:26,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:26,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:26,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745650891] [2022-11-03 03:48:26,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745650891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:26,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:26,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:26,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70870417] [2022-11-03 03:48:26,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:26,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:26,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:26,629 INFO L87 Difference]: Start difference. First operand 1580 states and 2503 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:27,766 INFO L93 Difference]: Finished difference Result 6243 states and 10199 transitions. [2022-11-03 03:48:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:48:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:27,805 INFO L225 Difference]: With dead ends: 6243 [2022-11-03 03:48:27,806 INFO L226 Difference]: Without dead ends: 4668 [2022-11-03 03:48:27,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:27,826 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 1118 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:27,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1226 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:48:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-11-03 03:48:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4382. [2022-11-03 03:48:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3775 states have (on average 1.5282119205298013) internal successors, (5769), 3725 states have internal predecessors, (5769), 442 states have call successors, (442), 148 states have call predecessors, (442), 164 states have return successors, (900), 509 states have call predecessors, (900), 442 states have call successors, (900) [2022-11-03 03:48:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7111 transitions. [2022-11-03 03:48:28,229 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7111 transitions. Word has length 73 [2022-11-03 03:48:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:28,232 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 7111 transitions. [2022-11-03 03:48:28,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7111 transitions. [2022-11-03 03:48:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:28,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:28,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:28,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:48:28,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:28,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1546695410, now seen corresponding path program 1 times [2022-11-03 03:48:28,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:28,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983602428] [2022-11-03 03:48:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:28,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:28,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983602428] [2022-11-03 03:48:28,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983602428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:28,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:28,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:28,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482869481] [2022-11-03 03:48:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:28,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:28,454 INFO L87 Difference]: Start difference. First operand 4382 states and 7111 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:29,250 INFO L93 Difference]: Finished difference Result 13053 states and 21820 transitions. [2022-11-03 03:48:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:48:29,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:29,365 INFO L225 Difference]: With dead ends: 13053 [2022-11-03 03:48:29,365 INFO L226 Difference]: Without dead ends: 8676 [2022-11-03 03:48:29,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:29,392 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 483 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:29,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 744 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:48:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2022-11-03 03:48:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 8644. [2022-11-03 03:48:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 7457 states have (on average 1.5187072549282554) internal successors, (11325), 7364 states have internal predecessors, (11325), 858 states have call successors, (858), 296 states have call predecessors, (858), 328 states have return successors, (1738), 984 states have call predecessors, (1738), 858 states have call successors, (1738) [2022-11-03 03:48:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 13921 transitions. [2022-11-03 03:48:30,036 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 13921 transitions. Word has length 73 [2022-11-03 03:48:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:30,036 INFO L495 AbstractCegarLoop]: Abstraction has 8644 states and 13921 transitions. [2022-11-03 03:48:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 13921 transitions. [2022-11-03 03:48:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:30,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:30,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:30,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:48:30,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1315437167, now seen corresponding path program 1 times [2022-11-03 03:48:30,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:30,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046153500] [2022-11-03 03:48:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:30,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:30,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046153500] [2022-11-03 03:48:30,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046153500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:30,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:30,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:30,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557602389] [2022-11-03 03:48:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:30,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:30,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:30,237 INFO L87 Difference]: Start difference. First operand 8644 states and 13921 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:32,264 INFO L93 Difference]: Finished difference Result 31731 states and 53021 transitions. [2022-11-03 03:48:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:48:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:32,409 INFO L225 Difference]: With dead ends: 31731 [2022-11-03 03:48:32,409 INFO L226 Difference]: Without dead ends: 23092 [2022-11-03 03:48:32,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:32,457 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1108 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:32,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1220 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2022-11-03 03:48:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 21824. [2022-11-03 03:48:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21824 states, 19065 states have (on average 1.529976396538159) internal successors, (29169), 18612 states have internal predecessors, (29169), 1918 states have call successors, (1918), 696 states have call predecessors, (1918), 840 states have return successors, (4950), 2516 states have call predecessors, (4950), 1918 states have call successors, (4950) [2022-11-03 03:48:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21824 states to 21824 states and 36037 transitions. [2022-11-03 03:48:34,293 INFO L78 Accepts]: Start accepts. Automaton has 21824 states and 36037 transitions. Word has length 73 [2022-11-03 03:48:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:34,294 INFO L495 AbstractCegarLoop]: Abstraction has 21824 states and 36037 transitions. [2022-11-03 03:48:34,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 21824 states and 36037 transitions. [2022-11-03 03:48:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:34,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:34,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:34,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:48:34,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash 824015728, now seen corresponding path program 1 times [2022-11-03 03:48:34,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:34,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081168183] [2022-11-03 03:48:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:34,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081168183] [2022-11-03 03:48:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081168183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:34,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:34,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763025832] [2022-11-03 03:48:34,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:34,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:34,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:34,422 INFO L87 Difference]: Start difference. First operand 21824 states and 36037 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:37,869 INFO L93 Difference]: Finished difference Result 78571 states and 135821 transitions. [2022-11-03 03:48:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:48:37,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:38,229 INFO L225 Difference]: With dead ends: 78571 [2022-11-03 03:48:38,229 INFO L226 Difference]: Without dead ends: 56752 [2022-11-03 03:48:38,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:38,330 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 1103 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:38,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1207 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:48:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56752 states. [2022-11-03 03:48:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56752 to 54052. [2022-11-03 03:48:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 47601 states have (on average 1.543265897775257) internal successors, (73461), 46028 states have internal predecessors, (73461), 4298 states have call successors, (4298), 1640 states have call predecessors, (4298), 2152 states have return successors, (13986), 6384 states have call predecessors, (13986), 4298 states have call successors, (13986) [2022-11-03 03:48:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 91745 transitions. [2022-11-03 03:48:42,236 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 91745 transitions. Word has length 73 [2022-11-03 03:48:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:42,236 INFO L495 AbstractCegarLoop]: Abstraction has 54052 states and 91745 transitions. [2022-11-03 03:48:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 91745 transitions. [2022-11-03 03:48:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:48:42,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:42,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:42,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:48:42,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash -940800881, now seen corresponding path program 1 times [2022-11-03 03:48:42,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535136305] [2022-11-03 03:48:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:42,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535136305] [2022-11-03 03:48:42,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535136305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:42,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:42,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:42,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933857360] [2022-11-03 03:48:42,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:42,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:42,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:42,407 INFO L87 Difference]: Start difference. First operand 54052 states and 91745 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:48:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:50,217 INFO L93 Difference]: Finished difference Result 195177 states and 351170 transitions. [2022-11-03 03:48:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:48:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-11-03 03:48:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:51,294 INFO L225 Difference]: With dead ends: 195177 [2022-11-03 03:48:51,295 INFO L226 Difference]: Without dead ends: 141130 [2022-11-03 03:48:51,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:51,761 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1101 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:51,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1208 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:48:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141130 states. [2022-11-03 03:49:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141130 to 134828. [2022-11-03 03:49:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134828 states, 119193 states have (on average 1.5529854941145873) internal successors, (185105), 113668 states have internal predecessors, (185105), 9994 states have call successors, (9994), 3960 states have call predecessors, (9994), 5640 states have return successors, (40894), 17200 states have call predecessors, (40894), 9994 states have call successors, (40894) [2022-11-03 03:49:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134828 states to 134828 states and 235993 transitions. [2022-11-03 03:49:01,830 INFO L78 Accepts]: Start accepts. Automaton has 134828 states and 235993 transitions. Word has length 73 [2022-11-03 03:49:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:01,831 INFO L495 AbstractCegarLoop]: Abstraction has 134828 states and 235993 transitions. [2022-11-03 03:49:01,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:49:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 134828 states and 235993 transitions. [2022-11-03 03:49:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 03:49:01,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:01,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:01,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:49:01,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 606133631, now seen corresponding path program 1 times [2022-11-03 03:49:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:01,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399429359] [2022-11-03 03:49:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:01,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:02,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:02,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399429359] [2022-11-03 03:49:02,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399429359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:02,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:02,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:49:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798326912] [2022-11-03 03:49:02,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:02,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:49:02,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:49:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:49:02,226 INFO L87 Difference]: Start difference. First operand 134828 states and 235993 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)