./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS --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 c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 --- 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-8393723 [2022-11-19 06:54:49,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:54:49,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:54:49,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:54:49,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:54:49,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:54:49,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:54:49,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:54:49,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:54:49,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:54:49,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:54:49,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:54:49,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:54:49,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:54:49,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:54:49,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:54:49,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:54:49,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:54:49,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:54:49,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:54:49,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:54:49,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:54:49,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:54:49,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:54:49,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:54:49,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:54:49,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:54:49,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:54:49,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:54:49,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:54:49,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:54:49,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:54:49,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:54:49,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:54:49,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:54:49,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:54:49,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:54:49,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:54:49,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:54:49,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:54:49,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:54:49,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:54:49,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:54:49,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:54:49,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:54:49,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:54:49,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:54:49,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:54:49,533 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:54:49,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:54:49,533 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:54:49,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:54:49,534 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:54:49,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:54:49,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:54:49,536 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:54:49,536 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:54:49,536 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:54:49,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:54:49,537 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:54:49,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:54:49,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:54:49,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:54:49,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:54:49,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:54:49,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:54:49,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:54:49,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:54:49,540 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:54:49,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:54:49,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:54:49,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:54:49,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:54:49,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:54:49,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:54:49,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:54:49,542 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:54:49,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:54:49,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:54:49,542 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:54:49,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:54:49,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:54:49,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:54:49,543 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_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 [2022-11-19 06:54:49,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:54:49,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:54:49,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:54:49,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:54:49,874 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:54:49,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2022-11-19 06:54:49,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/data/ebfa4d33c/e5a8cc3a39ae4954a85e9f9c695a7357/FLAG0c152d1a8 [2022-11-19 06:54:50,491 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:54:50,491 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2022-11-19 06:54:50,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/data/ebfa4d33c/e5a8cc3a39ae4954a85e9f9c695a7357/FLAG0c152d1a8 [2022-11-19 06:54:50,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/data/ebfa4d33c/e5a8cc3a39ae4954a85e9f9c695a7357 [2022-11-19 06:54:50,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:54:50,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:54:50,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:54:50,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:54:50,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:54:50,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:50" (1/1) ... [2022-11-19 06:54:50,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d0ede9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:50, skipping insertion in model container [2022-11-19 06:54:50,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:50" (1/1) ... [2022-11-19 06:54:50,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:54:50,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:54:51,156 WARN L234 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_399fb4a5-9052-45f6-9308-64f8c9745728/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[911,924] [2022-11-19 06:54:51,264 WARN L234 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_399fb4a5-9052-45f6-9308-64f8c9745728/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[8416,8429] [2022-11-19 06:54:51,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:54:51,393 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:54:51,405 WARN L234 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_399fb4a5-9052-45f6-9308-64f8c9745728/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[911,924] [2022-11-19 06:54:51,421 WARN L234 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_399fb4a5-9052-45f6-9308-64f8c9745728/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[8416,8429] [2022-11-19 06:54:51,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:54:51,478 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:54:51,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51 WrapperNode [2022-11-19 06:54:51,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:54:51,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:54:51,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:54:51,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:54:51,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,551 INFO L138 Inliner]: procedures = 71, calls = 86, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 851 [2022-11-19 06:54:51,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:54:51,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:54:51,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:54:51,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:54:51,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:54:51,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:54:51,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:54:51,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:54:51,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (1/1) ... [2022-11-19 06:54:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:54:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:51,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:54:51,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:54:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:54:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 06:54:51,710 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 06:54:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 06:54:51,710 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 06:54:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 06:54:51,710 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 06:54:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 06:54:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 06:54:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 06:54:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 06:54:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 06:54:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 06:54:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 06:54:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 06:54:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 06:54:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 06:54:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 06:54:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 06:54:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 06:54:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 06:54:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 06:54:51,713 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 06:54:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:54:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 06:54:51,713 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 06:54:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 06:54:51,713 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 06:54:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:54:51,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:54:51,714 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 06:54:51,714 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 06:54:51,714 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 06:54:51,714 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 06:54:51,902 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:54:51,918 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:54:52,888 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-19 06:54:52,889 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-19 06:54:52,991 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:54:53,388 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:54:53,389 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-19 06:54:53,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:53 BoogieIcfgContainer [2022-11-19 06:54:53,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:54:53,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:54:53,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:54:53,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:54:53,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:54:50" (1/3) ... [2022-11-19 06:54:53,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b5a625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:53, skipping insertion in model container [2022-11-19 06:54:53,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:51" (2/3) ... [2022-11-19 06:54:53,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b5a625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:53, skipping insertion in model container [2022-11-19 06:54:53,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:53" (3/3) ... [2022-11-19 06:54:53,402 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-2.c [2022-11-19 06:54:53,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:54:53,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:54:53,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:54:53,484 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;@6fd4fd69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:54:53,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:54:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 179 states have internal predecessors, (263), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 06:54:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 06:54:53,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:53,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:53,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash 656180081, now seen corresponding path program 1 times [2022-11-19 06:54:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546510020] [2022-11-19 06:54:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:54,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:54,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546510020] [2022-11-19 06:54:54,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546510020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:54,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:54,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:54:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339183663] [2022-11-19 06:54:54,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:54,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:54:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:54:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:54:54,093 INFO L87 Difference]: Start difference. First operand has 229 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 179 states have internal predecessors, (263), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:54:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:54,789 INFO L93 Difference]: Finished difference Result 580 states and 864 transitions. [2022-11-19 06:54:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:54:54,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-19 06:54:54,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:54,806 INFO L225 Difference]: With dead ends: 580 [2022-11-19 06:54:54,807 INFO L226 Difference]: Without dead ends: 352 [2022-11-19 06:54:54,812 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 [2022-11-19 06:54:54,816 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 393 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:54,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 606 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:54:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-19 06:54:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 341. [2022-11-19 06:54:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 252 states have (on average 1.4404761904761905) internal successors, (363), 257 states have internal predecessors, (363), 60 states have call successors, (60), 29 states have call predecessors, (60), 27 states have return successors, (59), 56 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-19 06:54:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-19 06:54:54,905 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 44 [2022-11-19 06:54:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:54,906 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-19 06:54:54,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:54:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-19 06:54:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:54:54,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:54,910 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] [2022-11-19 06:54:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:54:54,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1207893523, now seen corresponding path program 1 times [2022-11-19 06:54:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:54,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981606905] [2022-11-19 06:54:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:55,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981606905] [2022-11-19 06:54:55,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981606905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:55,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:55,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:54:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002642709] [2022-11-19 06:54:55,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:55,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:54:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:54:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:54:55,062 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:54:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:56,204 INFO L93 Difference]: Finished difference Result 878 states and 1205 transitions. [2022-11-19 06:54:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:54:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 06:54:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:56,209 INFO L225 Difference]: With dead ends: 878 [2022-11-19 06:54:56,209 INFO L226 Difference]: Without dead ends: 412 [2022-11-19 06:54:56,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:54:56,213 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 858 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:56,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1055 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:54:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-19 06:54:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 327. [2022-11-19 06:54:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 238 states have (on average 1.3865546218487395) internal successors, (330), 243 states have internal predecessors, (330), 60 states have call successors, (60), 29 states have call predecessors, (60), 27 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-19 06:54:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 446 transitions. [2022-11-19 06:54:56,287 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 446 transitions. Word has length 45 [2022-11-19 06:54:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:56,287 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 446 transitions. [2022-11-19 06:54:56,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:54:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 446 transitions. [2022-11-19 06:54:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:54:56,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:56,298 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] [2022-11-19 06:54:56,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:54:56,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1401114280, now seen corresponding path program 1 times [2022-11-19 06:54:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229058494] [2022-11-19 06:54:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:56,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:56,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229058494] [2022-11-19 06:54:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229058494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:56,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:56,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:54:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273644507] [2022-11-19 06:54:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:56,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:54:56,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:54:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:54:56,540 INFO L87 Difference]: Start difference. First operand 327 states and 446 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:54:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:57,359 INFO L93 Difference]: Finished difference Result 793 states and 1054 transitions. [2022-11-19 06:54:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:54:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-11-19 06:54:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:57,368 INFO L225 Difference]: With dead ends: 793 [2022-11-19 06:54:57,368 INFO L226 Difference]: Without dead ends: 616 [2022-11-19 06:54:57,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:54:57,378 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 766 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:57,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1009 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:54:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-19 06:54:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 591. [2022-11-19 06:54:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 419 states have (on average 1.3102625298329356) internal successors, (549), 424 states have internal predecessors, (549), 109 states have call successors, (109), 63 states have call predecessors, (109), 61 states have return successors, (122), 105 states have call predecessors, (122), 105 states have call successors, (122) [2022-11-19 06:54:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 780 transitions. [2022-11-19 06:54:57,474 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 780 transitions. Word has length 46 [2022-11-19 06:54:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:57,474 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 780 transitions. [2022-11-19 06:54:57,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:54:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 780 transitions. [2022-11-19 06:54:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:54:57,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:57,479 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] [2022-11-19 06:54:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:54:57,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 773971194, now seen corresponding path program 1 times [2022-11-19 06:54:57,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:57,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746734348] [2022-11-19 06:54:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:57,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:57,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746734348] [2022-11-19 06:54:57,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746734348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:57,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:57,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:54:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366042990] [2022-11-19 06:54:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:57,627 INFO L87 Difference]: Start difference. First operand 591 states and 780 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:54:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:57,756 INFO L93 Difference]: Finished difference Result 592 states and 781 transitions. [2022-11-19 06:54:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-11-19 06:54:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:57,759 INFO L225 Difference]: With dead ends: 592 [2022-11-19 06:54:57,760 INFO L226 Difference]: Without dead ends: 148 [2022-11-19 06:54:57,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:57,772 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 290 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:57,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 255 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:54:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-19 06:54:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-19 06:54:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 117 states have (on average 1.5128205128205128) internal successors, (177), 119 states have internal predecessors, (177), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 06:54:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 223 transitions. [2022-11-19 06:54:57,796 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 223 transitions. Word has length 50 [2022-11-19 06:54:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:57,798 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 223 transitions. [2022-11-19 06:54:57,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:54:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 223 transitions. [2022-11-19 06:54:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 06:54:57,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:57,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:57,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:54:57,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827729, now seen corresponding path program 1 times [2022-11-19 06:54:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:57,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193001064] [2022-11-19 06:54:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:57,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:57,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:57,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193001064] [2022-11-19 06:54:57,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193001064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:57,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:57,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:54:57,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939701075] [2022-11-19 06:54:57,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:57,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:54:57,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:54:57,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:54:57,954 INFO L87 Difference]: Start difference. First operand 148 states and 223 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:54:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:58,801 INFO L93 Difference]: Finished difference Result 816 states and 1310 transitions. [2022-11-19 06:54:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:54:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-11-19 06:54:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:58,810 INFO L225 Difference]: With dead ends: 816 [2022-11-19 06:54:58,810 INFO L226 Difference]: Without dead ends: 674 [2022-11-19 06:54:58,811 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 [2022-11-19 06:54:58,814 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 961 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:58,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1006 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:54:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-19 06:54:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 661. [2022-11-19 06:54:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 537 states have (on average 1.5065176908752327) internal successors, (809), 542 states have internal predecessors, (809), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (137), 88 states have call predecessors, (137), 91 states have call successors, (137) [2022-11-19 06:54:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1039 transitions. [2022-11-19 06:54:58,899 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1039 transitions. Word has length 56 [2022-11-19 06:54:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:58,900 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 1039 transitions. [2022-11-19 06:54:58,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:54:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1039 transitions. [2022-11-19 06:54:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 06:54:58,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:58,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:58,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:54:58,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -20747211, now seen corresponding path program 1 times [2022-11-19 06:54:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:58,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070180426] [2022-11-19 06:54:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:54:59,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070180426] [2022-11-19 06:54:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070180426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990706062] [2022-11-19 06:54:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:59,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:59,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:59,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:54:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:54:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 06:54:59,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:54:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990706062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:59,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:54:59,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:54:59,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257199175] [2022-11-19 06:54:59,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:54:59,570 INFO L87 Difference]: Start difference. First operand 661 states and 1039 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:54:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:59,829 INFO L93 Difference]: Finished difference Result 1955 states and 3163 transitions. [2022-11-19 06:54:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-19 06:54:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:59,841 INFO L225 Difference]: With dead ends: 1955 [2022-11-19 06:54:59,841 INFO L226 Difference]: Without dead ends: 1300 [2022-11-19 06:54:59,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:54:59,847 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 195 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:59,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 372 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:54:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-19 06:54:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1291. [2022-11-19 06:55:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1055 states have (on average 1.5014218009478673) internal successors, (1584), 1063 states have internal predecessors, (1584), 175 states have call successors, (175), 61 states have call predecessors, (175), 60 states have return successors, (261), 167 states have call predecessors, (261), 173 states have call successors, (261) [2022-11-19 06:55:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 2020 transitions. [2022-11-19 06:55:00,010 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 2020 transitions. Word has length 109 [2022-11-19 06:55:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:00,011 INFO L495 AbstractCegarLoop]: Abstraction has 1291 states and 2020 transitions. [2022-11-19 06:55:00,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 2020 transitions. [2022-11-19 06:55:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 06:55:00,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:00,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:00,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:55:00,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1612436117, now seen corresponding path program 1 times [2022-11-19 06:55:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:00,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276653442] [2022-11-19 06:55:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:55:00,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276653442] [2022-11-19 06:55:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276653442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407500545] [2022-11-19 06:55:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:00,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:00,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:55:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:55:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 06:55:00,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:00,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407500545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:00,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:55:00,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:55:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217113866] [2022-11-19 06:55:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:00,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:00,752 INFO L87 Difference]: Start difference. First operand 1291 states and 2020 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:01,102 INFO L93 Difference]: Finished difference Result 3830 states and 6162 transitions. [2022-11-19 06:55:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-19 06:55:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:01,120 INFO L225 Difference]: With dead ends: 3830 [2022-11-19 06:55:01,120 INFO L226 Difference]: Without dead ends: 2545 [2022-11-19 06:55:01,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:01,132 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 192 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:01,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 372 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2022-11-19 06:55:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2531. [2022-11-19 06:55:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2076 states have (on average 1.4951830443159924) internal successors, (3104), 2090 states have internal predecessors, (3104), 334 states have call successors, (334), 121 states have call predecessors, (334), 120 states have return successors, (500), 320 states have call predecessors, (500), 332 states have call successors, (500) [2022-11-19 06:55:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3938 transitions. [2022-11-19 06:55:01,409 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3938 transitions. Word has length 109 [2022-11-19 06:55:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:01,409 INFO L495 AbstractCegarLoop]: Abstraction has 2531 states and 3938 transitions. [2022-11-19 06:55:01,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3938 transitions. [2022-11-19 06:55:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 06:55:01,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:01,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:01,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:01,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2049181749, now seen corresponding path program 1 times [2022-11-19 06:55:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959437716] [2022-11-19 06:55:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:55:01,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959437716] [2022-11-19 06:55:01,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959437716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774971507] [2022-11-19 06:55:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:01,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:01,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:01,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:55:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:55:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:55:02,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:02,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774971507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:02,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:55:02,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:55:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848882686] [2022-11-19 06:55:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:02,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:02,096 INFO L87 Difference]: Start difference. First operand 2531 states and 3938 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:02,637 INFO L93 Difference]: Finished difference Result 7520 states and 12019 transitions. [2022-11-19 06:55:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:02,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-19 06:55:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:02,672 INFO L225 Difference]: With dead ends: 7520 [2022-11-19 06:55:02,673 INFO L226 Difference]: Without dead ends: 4995 [2022-11-19 06:55:02,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:02,687 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 186 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:02,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 372 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2022-11-19 06:55:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4971. [2022-11-19 06:55:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4971 states, 4088 states have (on average 1.4882583170254402) internal successors, (6084), 4114 states have internal predecessors, (6084), 642 states have call successors, (642), 241 states have call predecessors, (642), 240 states have return successors, (960), 616 states have call predecessors, (960), 640 states have call successors, (960) [2022-11-19 06:55:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4971 states to 4971 states and 7686 transitions. [2022-11-19 06:55:03,157 INFO L78 Accepts]: Start accepts. Automaton has 4971 states and 7686 transitions. Word has length 109 [2022-11-19 06:55:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:03,157 INFO L495 AbstractCegarLoop]: Abstraction has 4971 states and 7686 transitions. [2022-11-19 06:55:03,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4971 states and 7686 transitions. [2022-11-19 06:55:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 06:55:03,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:03,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:03,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:03,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash -177408555, now seen corresponding path program 1 times [2022-11-19 06:55:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:03,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663933135] [2022-11-19 06:55:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:03,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:55:03,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663933135] [2022-11-19 06:55:03,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663933135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539318893] [2022-11-19 06:55:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:03,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:03,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:03,555 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:03,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:55:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:55:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:55:03,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:03,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539318893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:03,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:55:03,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:55:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087766143] [2022-11-19 06:55:03,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:03,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:03,863 INFO L87 Difference]: Start difference. First operand 4971 states and 7686 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:04,719 INFO L93 Difference]: Finished difference Result 14780 states and 23451 transitions. [2022-11-19 06:55:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-19 06:55:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:04,781 INFO L225 Difference]: With dead ends: 14780 [2022-11-19 06:55:04,781 INFO L226 Difference]: Without dead ends: 9815 [2022-11-19 06:55:04,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:04,803 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 180 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:04,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 372 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9815 states. [2022-11-19 06:55:05,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9815 to 9771. [2022-11-19 06:55:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9771 states, 8052 states have (on average 1.4808743169398908) internal successors, (11924), 8102 states have internal predecessors, (11924), 1238 states have call successors, (1238), 481 states have call predecessors, (1238), 480 states have return successors, (1844), 1188 states have call predecessors, (1844), 1236 states have call successors, (1844) [2022-11-19 06:55:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9771 states to 9771 states and 15006 transitions. [2022-11-19 06:55:05,682 INFO L78 Accepts]: Start accepts. Automaton has 9771 states and 15006 transitions. Word has length 109 [2022-11-19 06:55:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:05,682 INFO L495 AbstractCegarLoop]: Abstraction has 9771 states and 15006 transitions. [2022-11-19 06:55:05,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:55:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 9771 states and 15006 transitions. [2022-11-19 06:55:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 06:55:05,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:05,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:05,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:05,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:05,905 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 518036341, now seen corresponding path program 1 times [2022-11-19 06:55:05,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:05,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909308214] [2022-11-19 06:55:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 06:55:06,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909308214] [2022-11-19 06:55:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909308214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:06,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:06,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446751541] [2022-11-19 06:55:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:06,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:06,047 INFO L87 Difference]: Start difference. First operand 9771 states and 15006 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:55:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:07,274 INFO L93 Difference]: Finished difference Result 19823 states and 31169 transitions. [2022-11-19 06:55:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:07,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-11-19 06:55:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:07,368 INFO L225 Difference]: With dead ends: 19823 [2022-11-19 06:55:07,368 INFO L226 Difference]: Without dead ends: 11979 [2022-11-19 06:55:07,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:07,398 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 92 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:07,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 469 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11979 states. [2022-11-19 06:55:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11979 to 11195. [2022-11-19 06:55:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11195 states, 9412 states have (on average 1.516787080322992) internal successors, (14276), 9462 states have internal predecessors, (14276), 1270 states have call successors, (1270), 513 states have call predecessors, (1270), 512 states have return successors, (1876), 1220 states have call predecessors, (1876), 1268 states have call successors, (1876) [2022-11-19 06:55:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11195 states to 11195 states and 17422 transitions. [2022-11-19 06:55:08,389 INFO L78 Accepts]: Start accepts. Automaton has 11195 states and 17422 transitions. Word has length 109 [2022-11-19 06:55:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:08,390 INFO L495 AbstractCegarLoop]: Abstraction has 11195 states and 17422 transitions. [2022-11-19 06:55:08,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:55:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11195 states and 17422 transitions. [2022-11-19 06:55:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 06:55:08,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:08,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:08,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:55:08,424 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1573541378, now seen corresponding path program 1 times [2022-11-19 06:55:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:08,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869184462] [2022-11-19 06:55:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 06:55:08,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869184462] [2022-11-19 06:55:08,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869184462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:08,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:08,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470555820] [2022-11-19 06:55:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:08,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:08,606 INFO L87 Difference]: Start difference. First operand 11195 states and 17422 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:55:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:10,263 INFO L93 Difference]: Finished difference Result 33220 states and 52775 transitions. [2022-11-19 06:55:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-19 06:55:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:10,398 INFO L225 Difference]: With dead ends: 33220 [2022-11-19 06:55:10,398 INFO L226 Difference]: Without dead ends: 22031 [2022-11-19 06:55:10,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:10,455 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 186 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:10,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 374 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22031 states. [2022-11-19 06:55:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22031 to 21915. [2022-11-19 06:55:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21915 states, 18436 states have (on average 1.5068344543284877) internal successors, (27780), 18534 states have internal predecessors, (27780), 2454 states have call successors, (2454), 1025 states have call predecessors, (2454), 1024 states have return successors, (3604), 2356 states have call predecessors, (3604), 2452 states have call successors, (3604) [2022-11-19 06:55:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21915 states to 21915 states and 33838 transitions. [2022-11-19 06:55:12,223 INFO L78 Accepts]: Start accepts. Automaton has 21915 states and 33838 transitions. Word has length 147 [2022-11-19 06:55:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:12,225 INFO L495 AbstractCegarLoop]: Abstraction has 21915 states and 33838 transitions. [2022-11-19 06:55:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:55:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21915 states and 33838 transitions. [2022-11-19 06:55:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 06:55:12,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:12,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:55:12,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1546705821, now seen corresponding path program 1 times [2022-11-19 06:55:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250666566] [2022-11-19 06:55:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 06:55:12,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250666566] [2022-11-19 06:55:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250666566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:12,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:12,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:12,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141757224] [2022-11-19 06:55:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:12,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:12,410 INFO L87 Difference]: Start difference. First operand 21915 states and 33838 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:55:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:15,645 INFO L93 Difference]: Finished difference Result 65028 states and 102407 transitions. [2022-11-19 06:55:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:15,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-19 06:55:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:15,842 INFO L225 Difference]: With dead ends: 65028 [2022-11-19 06:55:15,842 INFO L226 Difference]: Without dead ends: 43119 [2022-11-19 06:55:15,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:15,916 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 188 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:15,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 374 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:55:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43119 states. [2022-11-19 06:55:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43119 to 42891. [2022-11-19 06:55:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42891 states, 36100 states have (on average 1.496398891966759) internal successors, (54020), 36294 states have internal predecessors, (54020), 4742 states have call successors, (4742), 2049 states have call predecessors, (4742), 2048 states have return successors, (6916), 4548 states have call predecessors, (6916), 4740 states have call successors, (6916) [2022-11-19 06:55:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42891 states to 42891 states and 65678 transitions. [2022-11-19 06:55:18,940 INFO L78 Accepts]: Start accepts. Automaton has 42891 states and 65678 transitions. Word has length 147 [2022-11-19 06:55:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:18,940 INFO L495 AbstractCegarLoop]: Abstraction has 42891 states and 65678 transitions. [2022-11-19 06:55:18,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:55:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42891 states and 65678 transitions. [2022-11-19 06:55:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 06:55:19,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:19,051 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:55:19,051 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1418443996, now seen corresponding path program 1 times [2022-11-19 06:55:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483160124] [2022-11-19 06:55:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:19,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 06:55:19,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483160124] [2022-11-19 06:55:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483160124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:19,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:19,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776617600] [2022-11-19 06:55:19,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:19,524 INFO L87 Difference]: Start difference. First operand 42891 states and 65678 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:55:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:24,968 INFO L93 Difference]: Finished difference Result 127252 states and 198551 transitions. [2022-11-19 06:55:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-19 06:55:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:25,393 INFO L225 Difference]: With dead ends: 127252 [2022-11-19 06:55:25,394 INFO L226 Difference]: Without dead ends: 84367 [2022-11-19 06:55:25,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:25,614 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 191 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:25,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 376 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84367 states. [2022-11-19 06:55:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84367 to 83915. [2022-11-19 06:55:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83915 states, 70660 states have (on average 1.4854797622417208) internal successors, (104964), 71046 states have internal predecessors, (104964), 9158 states have call successors, (9158), 4097 states have call predecessors, (9158), 4096 states have return successors, (13252), 8772 states have call predecessors, (13252), 9156 states have call successors, (13252) [2022-11-19 06:55:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83915 states to 83915 states and 127374 transitions. [2022-11-19 06:55:31,796 INFO L78 Accepts]: Start accepts. Automaton has 83915 states and 127374 transitions. Word has length 147 [2022-11-19 06:55:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:31,796 INFO L495 AbstractCegarLoop]: Abstraction has 83915 states and 127374 transitions. [2022-11-19 06:55:31,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:55:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 83915 states and 127374 transitions. [2022-11-19 06:55:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-19 06:55:32,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:32,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:32,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 06:55:32,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash -310605518, now seen corresponding path program 1 times [2022-11-19 06:55:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427453463] [2022-11-19 06:55:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:32,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:55:32,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427453463] [2022-11-19 06:55:32,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427453463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:32,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155501516] [2022-11-19 06:55:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:32,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:32,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:32,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399fb4a5-9052-45f6-9308-64f8c9745728/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:55:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:55:32,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 06:55:32,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:32,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155501516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:32,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:55:32,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 06:55:32,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810626937] [2022-11-19 06:55:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:32,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:32,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:55:32,855 INFO L87 Difference]: Start difference. First operand 83915 states and 127374 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)