./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/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_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/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_f7171319-4c8f-4421-abaf-486e14c26908/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 a31ccbb50ed824a1b6eea67c3747e38f48ab93613ea1abf86baf8d129dc78945 --- 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 07:26:55,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:26:55,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:26:55,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:26:55,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:26:55,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:26:55,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:26:55,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:26:55,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:26:55,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:26:55,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:26:55,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:26:55,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:26:55,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:26:55,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:26:55,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:26:55,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:26:55,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:26:55,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:26:55,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:26:55,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:26:55,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:26:55,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:26:55,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:26:55,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:26:55,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:26:55,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:26:55,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:26:55,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:26:55,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:26:55,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:26:55,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:26:55,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:26:55,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:26:55,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:26:55,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:26:55,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:26:55,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:26:55,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:26:55,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:26:55,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:26:55,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:26:55,520 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:26:55,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:26:55,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:26:55,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:26:55,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:26:55,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:26:55,523 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:26:55,523 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:26:55,523 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:26:55,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:26:55,524 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:26:55,525 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:26:55,525 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:26:55,525 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:26:55,525 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:26:55,526 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:26:55,526 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:26:55,526 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:26:55,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:26:55,527 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:26:55,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:26:55,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:26:55,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:26:55,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:26:55,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:26:55,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:26:55,530 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:26:55,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:26:55,530 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:26:55,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:26:55,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:26:55,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:26:55,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:55,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:26:55,532 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:26:55,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:26:55,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:26:55,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:26:55,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:26:55,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:26:55,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:26:55,533 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_f7171319-4c8f-4421-abaf-486e14c26908/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a31ccbb50ed824a1b6eea67c3747e38f48ab93613ea1abf86baf8d129dc78945 [2022-11-19 07:26:55,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:26:55,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:26:55,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:26:55,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:26:55,855 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:26:55,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2022-11-19 07:26:55,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/data/af2fd6799/d6541a01a989432babce99c33fab977c/FLAGdf2bbe1f9 [2022-11-19 07:26:56,422 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:26:56,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2022-11-19 07:26:56,443 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/data/af2fd6799/d6541a01a989432babce99c33fab977c/FLAGdf2bbe1f9 [2022-11-19 07:26:56,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/data/af2fd6799/d6541a01a989432babce99c33fab977c [2022-11-19 07:26:56,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:26:56,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:26:56,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:56,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:26:56,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:26:56,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:56" (1/1) ... [2022-11-19 07:26:56,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bee30c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:56, skipping insertion in model container [2022-11-19 07:26:56,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:56" (1/1) ... [2022-11-19 07:26:56,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:26:56,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:26:57,050 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_f7171319-4c8f-4421-abaf-486e14c26908/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[914,927] [2022-11-19 07:26:57,113 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_f7171319-4c8f-4421-abaf-486e14c26908/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[7115,7128] [2022-11-19 07:26:57,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:57,172 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:26:57,182 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_f7171319-4c8f-4421-abaf-486e14c26908/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[914,927] [2022-11-19 07:26:57,202 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_f7171319-4c8f-4421-abaf-486e14c26908/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[7115,7128] [2022-11-19 07:26:57,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:57,266 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:26:57,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57 WrapperNode [2022-11-19 07:26:57,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:57,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:57,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:26:57,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:26:57,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,334 INFO L138 Inliner]: procedures = 59, calls = 67, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 523 [2022-11-19 07:26:57,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:57,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:26:57,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:26:57,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:26:57,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,397 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:26:57,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:26:57,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:26:57,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:26:57,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (1/1) ... [2022-11-19 07:26:57,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:57,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:57,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:26:57,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:26:57,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:26:57,509 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:26:57,510 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:26:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 07:26:57,510 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 07:26:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:26:57,510 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:26:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:26:57,510 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:26:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 07:26:57,511 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 07:26:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:26:57,511 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:26:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:26:57,511 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:26:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 07:26:57,511 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 07:26:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 07:26:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 07:26:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 07:26:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 07:26:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:26:57,512 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:26:57,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:26:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:26:57,513 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:26:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 07:26:57,513 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 07:26:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:26:57,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:26:57,513 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:26:57,514 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:26:57,514 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 07:26:57,514 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 07:26:57,622 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:26:57,628 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:26:58,431 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:26:58,732 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:26:58,733 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-19 07:26:58,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:58 BoogieIcfgContainer [2022-11-19 07:26:58,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:26:58,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:26:58,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:26:58,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:26:58,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:26:56" (1/3) ... [2022-11-19 07:26:58,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2168d342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:58, skipping insertion in model container [2022-11-19 07:26:58,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:57" (2/3) ... [2022-11-19 07:26:58,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2168d342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:58, skipping insertion in model container [2022-11-19 07:26:58,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:58" (3/3) ... [2022-11-19 07:26:58,753 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2022-11-19 07:26:58,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:26:58,775 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:26:58,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:26:58,844 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;@5c212fcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:26:58,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:26:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 124 states have internal predecessors, (175), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-19 07:26:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:26:58,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:58,861 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] [2022-11-19 07:26:58,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1167095686, now seen corresponding path program 1 times [2022-11-19 07:26:58,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:58,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061805191] [2022-11-19 07:26:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:59,424 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 07:26:59,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:59,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061805191] [2022-11-19 07:26:59,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061805191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:59,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:59,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:26:59,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576013240] [2022-11-19 07:26:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:59,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:26:59,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:26:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:59,497 INFO L87 Difference]: Start difference. First operand has 167 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 124 states have internal predecessors, (175), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 07:27:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:00,437 INFO L93 Difference]: Finished difference Result 639 states and 968 transitions. [2022-11-19 07:27:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:27:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 41 [2022-11-19 07:27:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:00,466 INFO L225 Difference]: With dead ends: 639 [2022-11-19 07:27:00,470 INFO L226 Difference]: Without dead ends: 467 [2022-11-19 07:27:00,479 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 07:27:00,484 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 639 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:00,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 693 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:27:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-19 07:27:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 454. [2022-11-19 07:27:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 333 states have (on average 1.4204204204204205) internal successors, (473), 341 states have internal predecessors, (473), 82 states have call successors, (82), 39 states have call predecessors, (82), 37 states have return successors, (104), 75 states have call predecessors, (104), 78 states have call successors, (104) [2022-11-19 07:27:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 659 transitions. [2022-11-19 07:27:00,633 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 659 transitions. Word has length 41 [2022-11-19 07:27:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:00,633 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 659 transitions. [2022-11-19 07:27:00,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 07:27:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 659 transitions. [2022-11-19 07:27:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:27:00,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:00,637 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 07:27:00,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:27:00,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:00,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1688999553, now seen corresponding path program 1 times [2022-11-19 07:27:00,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:00,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172126611] [2022-11-19 07:27:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:00,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:00,854 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 07:27:00,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172126611] [2022-11-19 07:27:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172126611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:00,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:00,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:27:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105152019] [2022-11-19 07:27:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:00,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:27:00,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:27:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:27:00,858 INFO L87 Difference]: Start difference. First operand 454 states and 659 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:27:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:01,545 INFO L93 Difference]: Finished difference Result 582 states and 818 transitions. [2022-11-19 07:27:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:27:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-19 07:27:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:01,551 INFO L225 Difference]: With dead ends: 582 [2022-11-19 07:27:01,551 INFO L226 Difference]: Without dead ends: 519 [2022-11-19 07:27:01,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:27:01,554 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 358 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:01,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 681 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:27:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-19 07:27:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 506. [2022-11-19 07:27:01,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 370 states have (on average 1.4108108108108108) internal successors, (522), 378 states have internal predecessors, (522), 90 states have call successors, (90), 46 states have call predecessors, (90), 44 states have return successors, (112), 83 states have call predecessors, (112), 86 states have call successors, (112) [2022-11-19 07:27:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 724 transitions. [2022-11-19 07:27:01,615 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 724 transitions. Word has length 45 [2022-11-19 07:27:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:01,615 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 724 transitions. [2022-11-19 07:27:01,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:27:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 724 transitions. [2022-11-19 07:27:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:27:01,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:01,626 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 07:27:01,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:27:01,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash 477368972, now seen corresponding path program 1 times [2022-11-19 07:27:01,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:01,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700500920] [2022-11-19 07:27:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:01,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:01,694 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 07:27:01,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700500920] [2022-11-19 07:27:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700500920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:01,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215152618] [2022-11-19 07:27:01,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:01,697 INFO L87 Difference]: Start difference. First operand 506 states and 724 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 07:27:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:01,830 INFO L93 Difference]: Finished difference Result 731 states and 1011 transitions. [2022-11-19 07:27:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2022-11-19 07:27:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:01,835 INFO L225 Difference]: With dead ends: 731 [2022-11-19 07:27:01,835 INFO L226 Difference]: Without dead ends: 615 [2022-11-19 07:27:01,836 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 07:27:01,838 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 199 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:01,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 257 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-19 07:27:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 601. [2022-11-19 07:27:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 435 states have (on average 1.3839080459770114) internal successors, (602), 443 states have internal predecessors, (602), 106 states have call successors, (106), 60 states have call predecessors, (106), 58 states have return successors, (128), 99 states have call predecessors, (128), 102 states have call successors, (128) [2022-11-19 07:27:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 836 transitions. [2022-11-19 07:27:01,947 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 836 transitions. Word has length 46 [2022-11-19 07:27:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:01,947 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 836 transitions. [2022-11-19 07:27:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 07:27:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 836 transitions. [2022-11-19 07:27:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:27:01,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:01,950 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] [2022-11-19 07:27:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:27:01,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1207396304, now seen corresponding path program 1 times [2022-11-19 07:27:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068059789] [2022-11-19 07:27:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:02,002 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 07:27:02,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:02,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068059789] [2022-11-19 07:27:02,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068059789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:02,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:02,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:02,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525408906] [2022-11-19 07:27:02,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:02,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:02,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:02,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:02,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:02,006 INFO L87 Difference]: Start difference. First operand 601 states and 836 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 07:27:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:02,176 INFO L93 Difference]: Finished difference Result 965 states and 1284 transitions. [2022-11-19 07:27:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 47 [2022-11-19 07:27:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:02,181 INFO L225 Difference]: With dead ends: 965 [2022-11-19 07:27:02,181 INFO L226 Difference]: Without dead ends: 755 [2022-11-19 07:27:02,182 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 07:27:02,184 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 68 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:02,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 362 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-19 07:27:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 751. [2022-11-19 07:27:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 540 states have (on average 1.364814814814815) internal successors, (737), 548 states have internal predecessors, (737), 130 states have call successors, (130), 81 states have call predecessors, (130), 79 states have return successors, (152), 123 states have call predecessors, (152), 126 states have call successors, (152) [2022-11-19 07:27:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1019 transitions. [2022-11-19 07:27:02,291 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1019 transitions. Word has length 47 [2022-11-19 07:27:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:02,291 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1019 transitions. [2022-11-19 07:27:02,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 07:27:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1019 transitions. [2022-11-19 07:27:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:27:02,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:02,294 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] [2022-11-19 07:27:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:27:02,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1334032591, now seen corresponding path program 1 times [2022-11-19 07:27:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386000463] [2022-11-19 07:27:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:02,339 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 07:27:02,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386000463] [2022-11-19 07:27:02,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386000463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:02,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:02,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:02,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590952298] [2022-11-19 07:27:02,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:02,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:02,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:02,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:02,343 INFO L87 Difference]: Start difference. First operand 751 states and 1019 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 07:27:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:02,523 INFO L93 Difference]: Finished difference Result 1175 states and 1541 transitions. [2022-11-19 07:27:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 53 [2022-11-19 07:27:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:02,528 INFO L225 Difference]: With dead ends: 1175 [2022-11-19 07:27:02,528 INFO L226 Difference]: Without dead ends: 814 [2022-11-19 07:27:02,529 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 07:27:02,534 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 199 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:02,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 264 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-19 07:27:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 802. [2022-11-19 07:27:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 576 states have (on average 1.3524305555555556) internal successors, (779), 584 states have internal predecessors, (779), 138 states have call successors, (138), 88 states have call predecessors, (138), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-19 07:27:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1077 transitions. [2022-11-19 07:27:02,633 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1077 transitions. Word has length 53 [2022-11-19 07:27:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:02,634 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1077 transitions. [2022-11-19 07:27:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 07:27:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1077 transitions. [2022-11-19 07:27:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:27:02,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:02,638 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:02,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:27:02,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2110959813, now seen corresponding path program 1 times [2022-11-19 07:27:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680833917] [2022-11-19 07:27:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:02,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:02,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680833917] [2022-11-19 07:27:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680833917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:02,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:02,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:27:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153114919] [2022-11-19 07:27:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:27:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:27:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:02,791 INFO L87 Difference]: Start difference. First operand 802 states and 1077 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:27:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:03,115 INFO L93 Difference]: Finished difference Result 911 states and 1209 transitions. [2022-11-19 07:27:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:27:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 07:27:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:03,120 INFO L225 Difference]: With dead ends: 911 [2022-11-19 07:27:03,121 INFO L226 Difference]: Without dead ends: 908 [2022-11-19 07:27:03,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:03,128 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 360 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:03,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 243 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:27:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-19 07:27:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 801. [2022-11-19 07:27:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 576 states have (on average 1.3472222222222223) internal successors, (776), 583 states have internal predecessors, (776), 137 states have call successors, (137), 88 states have call predecessors, (137), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-19 07:27:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1073 transitions. [2022-11-19 07:27:03,238 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1073 transitions. Word has length 54 [2022-11-19 07:27:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:03,240 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1073 transitions. [2022-11-19 07:27:03,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:27:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1073 transitions. [2022-11-19 07:27:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:27:03,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:03,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:27:03,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1016045927, now seen corresponding path program 1 times [2022-11-19 07:27:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:03,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069880582] [2022-11-19 07:27:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:03,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069880582] [2022-11-19 07:27:03,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069880582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656430300] [2022-11-19 07:27:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:03,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:03,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:03,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:27:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:03,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:27:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:03,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:04,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656430300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658524630] [2022-11-19 07:27:04,193 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:27:04,193 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:04,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:04,202 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:04,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:07,072 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 115 for LOIs [2022-11-19 07:27:07,095 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 83 for LOIs [2022-11-19 07:27:07,104 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 111 for LOIs [2022-11-19 07:27:07,123 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 119 for LOIs [2022-11-19 07:27:07,538 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 115 for LOIs [2022-11-19 07:27:07,586 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 115 for LOIs [2022-11-19 07:27:07,633 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 115 for LOIs [2022-11-19 07:27:07,654 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 122 for LOIs [2022-11-19 07:27:07,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:19,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13689#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:19,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:19,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:19,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 07:27:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468285694] [2022-11-19 07:27:19,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:19,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:27:19,589 INFO L87 Difference]: Start difference. First operand 801 states and 1073 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:27:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:20,214 INFO L93 Difference]: Finished difference Result 1590 states and 2041 transitions. [2022-11-19 07:27:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:27:20,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-19 07:27:20,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:20,223 INFO L225 Difference]: With dead ends: 1590 [2022-11-19 07:27:20,223 INFO L226 Difference]: Without dead ends: 1587 [2022-11-19 07:27:20,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:27:20,226 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 522 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:20,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 797 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:27:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-11-19 07:27:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1207. [2022-11-19 07:27:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 862 states have (on average 1.3271461716937354) internal successors, (1144), 869 states have internal predecessors, (1144), 201 states have call successors, (201), 144 states have call predecessors, (201), 142 states have return successors, (224), 195 states have call predecessors, (224), 198 states have call successors, (224) [2022-11-19 07:27:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1569 transitions. [2022-11-19 07:27:20,348 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1569 transitions. Word has length 55 [2022-11-19 07:27:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:20,349 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1569 transitions. [2022-11-19 07:27:20,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 07:27:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1569 transitions. [2022-11-19 07:27:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:27:20,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:20,351 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:20,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:27:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:20,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash 911438139, now seen corresponding path program 2 times [2022-11-19 07:27:20,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444008949] [2022-11-19 07:27:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:20,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444008949] [2022-11-19 07:27:20,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444008949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:20,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:20,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:20,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607033211] [2022-11-19 07:27:20,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:20,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:20,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:20,598 INFO L87 Difference]: Start difference. First operand 1207 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:27:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:20,754 INFO L93 Difference]: Finished difference Result 1628 states and 2086 transitions. [2022-11-19 07:27:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:20,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-19 07:27:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:20,768 INFO L225 Difference]: With dead ends: 1628 [2022-11-19 07:27:20,768 INFO L226 Difference]: Without dead ends: 1007 [2022-11-19 07:27:20,772 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 07:27:20,773 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 199 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:20,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 300 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-11-19 07:27:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1005. [2022-11-19 07:27:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 720 states have (on average 1.3222222222222222) internal successors, (952), 727 states have internal predecessors, (952), 169 states have call successors, (169), 116 states have call predecessors, (169), 114 states have return successors, (192), 163 states have call predecessors, (192), 166 states have call successors, (192) [2022-11-19 07:27:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1313 transitions. [2022-11-19 07:27:20,903 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1313 transitions. Word has length 58 [2022-11-19 07:27:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:20,903 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1313 transitions. [2022-11-19 07:27:20,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:27:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1313 transitions. [2022-11-19 07:27:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:27:20,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:20,905 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:27:20,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:27:20,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1293696756, now seen corresponding path program 1 times [2022-11-19 07:27:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100840172] [2022-11-19 07:27:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:27:20,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100840172] [2022-11-19 07:27:20,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100840172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:20,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:20,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:20,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286852927] [2022-11-19 07:27:20,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:20,951 INFO L87 Difference]: Start difference. First operand 1005 states and 1313 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 07:27:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:21,137 INFO L93 Difference]: Finished difference Result 1640 states and 2091 transitions. [2022-11-19 07:27:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2022-11-19 07:27:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:21,144 INFO L225 Difference]: With dead ends: 1640 [2022-11-19 07:27:21,144 INFO L226 Difference]: Without dead ends: 1263 [2022-11-19 07:27:21,145 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 07:27:21,148 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 44 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:21,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 406 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-11-19 07:27:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1082. [2022-11-19 07:27:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 783 states have (on average 1.3218390804597702) internal successors, (1035), 790 states have internal predecessors, (1035), 176 states have call successors, (176), 123 states have call predecessors, (176), 121 states have return successors, (199), 170 states have call predecessors, (199), 173 states have call successors, (199) [2022-11-19 07:27:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1410 transitions. [2022-11-19 07:27:21,259 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1410 transitions. Word has length 61 [2022-11-19 07:27:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 1410 transitions. [2022-11-19 07:27:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 07:27:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1410 transitions. [2022-11-19 07:27:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:27:21,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:21,264 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-11-19 07:27:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:27:21,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1159413313, now seen corresponding path program 1 times [2022-11-19 07:27:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732373025] [2022-11-19 07:27:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:27:21,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732373025] [2022-11-19 07:27:21,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732373025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:21,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:21,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:27:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577994286] [2022-11-19 07:27:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:27:21,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:27:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:27:21,444 INFO L87 Difference]: Start difference. First operand 1082 states and 1410 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:27:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:22,171 INFO L93 Difference]: Finished difference Result 2143 states and 2671 transitions. [2022-11-19 07:27:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:27:22,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-19 07:27:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:22,178 INFO L225 Difference]: With dead ends: 2143 [2022-11-19 07:27:22,178 INFO L226 Difference]: Without dead ends: 1452 [2022-11-19 07:27:22,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:27:22,181 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 327 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:22,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 664 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:27:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-11-19 07:27:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1403. [2022-11-19 07:27:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 999 states have (on average 1.2932932932932932) internal successors, (1292), 1006 states have internal predecessors, (1292), 232 states have call successors, (232), 172 states have call predecessors, (232), 170 states have return successors, (255), 226 states have call predecessors, (255), 229 states have call successors, (255) [2022-11-19 07:27:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1779 transitions. [2022-11-19 07:27:22,368 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1779 transitions. Word has length 70 [2022-11-19 07:27:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:22,369 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1779 transitions. [2022-11-19 07:27:22,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:27:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1779 transitions. [2022-11-19 07:27:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:27:22,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:22,371 INFO L195 NwaCegarLoop]: trace histogram [3, 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 07:27:22,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:27:22,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1040698135, now seen corresponding path program 1 times [2022-11-19 07:27:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:22,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432820344] [2022-11-19 07:27:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:22,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:27:22,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:22,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432820344] [2022-11-19 07:27:22,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432820344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:22,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:22,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:22,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978165931] [2022-11-19 07:27:22,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:22,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:22,427 INFO L87 Difference]: Start difference. First operand 1403 states and 1779 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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 07:27:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:22,657 INFO L93 Difference]: Finished difference Result 2434 states and 3012 transitions. [2022-11-19 07:27:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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 71 [2022-11-19 07:27:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:22,665 INFO L225 Difference]: With dead ends: 2434 [2022-11-19 07:27:22,665 INFO L226 Difference]: Without dead ends: 1577 [2022-11-19 07:27:22,667 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 07:27:22,668 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 39 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:22,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 400 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2022-11-19 07:27:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1448. [2022-11-19 07:27:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1036 states have (on average 1.2895752895752897) internal successors, (1336), 1043 states have internal predecessors, (1336), 236 states have call successors, (236), 176 states have call predecessors, (236), 174 states have return successors, (259), 230 states have call predecessors, (259), 233 states have call successors, (259) [2022-11-19 07:27:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1831 transitions. [2022-11-19 07:27:22,882 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1831 transitions. Word has length 71 [2022-11-19 07:27:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:22,882 INFO L495 AbstractCegarLoop]: Abstraction has 1448 states and 1831 transitions. [2022-11-19 07:27:22,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (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 07:27:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1831 transitions. [2022-11-19 07:27:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:27:22,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:22,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:22,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:27:22,886 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1272462900, now seen corresponding path program 1 times [2022-11-19 07:27:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:22,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062969779] [2022-11-19 07:27:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:27:22,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062969779] [2022-11-19 07:27:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062969779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777616679] [2022-11-19 07:27:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:22,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:23,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:27:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:27:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:27:23,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:23,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777616679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:23,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:23,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:27:23,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817593166] [2022-11-19 07:27:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:23,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:23,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:27:23,190 INFO L87 Difference]: Start difference. First operand 1448 states and 1831 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 07:27:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:23,468 INFO L93 Difference]: Finished difference Result 2192 states and 2970 transitions. [2022-11-19 07:27:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 74 [2022-11-19 07:27:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:23,477 INFO L225 Difference]: With dead ends: 2192 [2022-11-19 07:27:23,477 INFO L226 Difference]: Without dead ends: 1812 [2022-11-19 07:27:23,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 07:27:23,480 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 193 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:23,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 292 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-19 07:27:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1803. [2022-11-19 07:27:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1304 states have (on average 1.312116564417178) internal successors, (1711), 1314 states have internal predecessors, (1711), 293 states have call successors, (293), 206 states have call predecessors, (293), 204 states have return successors, (338), 284 states have call predecessors, (338), 290 states have call successors, (338) [2022-11-19 07:27:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2342 transitions. [2022-11-19 07:27:23,718 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2342 transitions. Word has length 74 [2022-11-19 07:27:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:23,718 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2342 transitions. [2022-11-19 07:27:23,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 07:27:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2342 transitions. [2022-11-19 07:27:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:27:23,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:23,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:23,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:27:23,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1534910666, now seen corresponding path program 1 times [2022-11-19 07:27:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131044556] [2022-11-19 07:27:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:27:24,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131044556] [2022-11-19 07:27:24,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131044556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:24,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:24,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:27:24,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662229960] [2022-11-19 07:27:24,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:24,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:27:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:27:24,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:27:24,193 INFO L87 Difference]: Start difference. First operand 1803 states and 2342 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:27:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:24,882 INFO L93 Difference]: Finished difference Result 3039 states and 4193 transitions. [2022-11-19 07:27:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:27:24,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2022-11-19 07:27:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:24,893 INFO L225 Difference]: With dead ends: 3039 [2022-11-19 07:27:24,894 INFO L226 Difference]: Without dead ends: 2305 [2022-11-19 07:27:24,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:27:24,898 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 404 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:24,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 591 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:27:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2022-11-19 07:27:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2217. [2022-11-19 07:27:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 1613 states have (on average 1.3223806571605703) internal successors, (2133), 1627 states have internal predecessors, (2133), 362 states have call successors, (362), 242 states have call predecessors, (362), 240 states have return successors, (440), 349 states have call predecessors, (440), 359 states have call successors, (440) [2022-11-19 07:27:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2935 transitions. [2022-11-19 07:27:25,192 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2935 transitions. Word has length 74 [2022-11-19 07:27:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:25,192 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 2935 transitions. [2022-11-19 07:27:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:27:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2935 transitions. [2022-11-19 07:27:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:27:25,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:25,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:27:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:27:25,196 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -66115808, now seen corresponding path program 1 times [2022-11-19 07:27:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:25,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139168514] [2022-11-19 07:27:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:27:25,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:25,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139168514] [2022-11-19 07:27:25,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139168514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:25,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:25,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:25,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971140763] [2022-11-19 07:27:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:25,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:25,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:25,262 INFO L87 Difference]: Start difference. First operand 2217 states and 2935 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 07:27:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:25,616 INFO L93 Difference]: Finished difference Result 3467 states and 4802 transitions. [2022-11-19 07:27:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 75 [2022-11-19 07:27:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:25,634 INFO L225 Difference]: With dead ends: 3467 [2022-11-19 07:27:25,634 INFO L226 Difference]: Without dead ends: 2461 [2022-11-19 07:27:25,638 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 07:27:25,639 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 46 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:25,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 419 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-11-19 07:27:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2336. [2022-11-19 07:27:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1720 states have (on average 1.3401162790697674) internal successors, (2305), 1734 states have internal predecessors, (2305), 368 states have call successors, (368), 248 states have call predecessors, (368), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-19 07:27:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3119 transitions. [2022-11-19 07:27:25,992 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3119 transitions. Word has length 75 [2022-11-19 07:27:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:25,992 INFO L495 AbstractCegarLoop]: Abstraction has 2336 states and 3119 transitions. [2022-11-19 07:27:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 07:27:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3119 transitions. [2022-11-19 07:27:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:27:25,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:25,997 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1] [2022-11-19 07:27:25,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:27:25,998 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 852508330, now seen corresponding path program 1 times [2022-11-19 07:27:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895004106] [2022-11-19 07:27:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:27:26,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:26,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895004106] [2022-11-19 07:27:26,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895004106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:26,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170490703] [2022-11-19 07:27:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:26,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:26,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:26,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:26,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:27:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:26,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:27:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:27:26,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170490703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:26,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:26,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-19 07:27:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365623124] [2022-11-19 07:27:26,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:26,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:26,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:27:26,639 INFO L87 Difference]: Start difference. First operand 2336 states and 3119 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:27:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:26,977 INFO L93 Difference]: Finished difference Result 3165 states and 4137 transitions. [2022-11-19 07:27:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:26,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 07:27:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:26,991 INFO L225 Difference]: With dead ends: 3165 [2022-11-19 07:27:26,992 INFO L226 Difference]: Without dead ends: 2365 [2022-11-19 07:27:26,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:27:26,997 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 47 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:26,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 406 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2022-11-19 07:27:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2332. [2022-11-19 07:27:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 1716 states have (on average 1.3222610722610724) internal successors, (2269), 1730 states have internal predecessors, (2269), 368 states have call successors, (368), 248 states have call predecessors, (368), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-19 07:27:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3083 transitions. [2022-11-19 07:27:27,319 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3083 transitions. Word has length 102 [2022-11-19 07:27:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:27,320 INFO L495 AbstractCegarLoop]: Abstraction has 2332 states and 3083 transitions. [2022-11-19 07:27:27,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:27:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3083 transitions. [2022-11-19 07:27:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:27:27,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:27,329 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-11-19 07:27:27,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:27:27,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1865901207, now seen corresponding path program 1 times [2022-11-19 07:27:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148851826] [2022-11-19 07:27:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:27:27,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148851826] [2022-11-19 07:27:27,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148851826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659623476] [2022-11-19 07:27:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:27,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:27,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:27,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:27:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:27:28,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:27:28,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:28,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659623476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:28,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:28,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 07:27:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904184208] [2022-11-19 07:27:28,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:27:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:27:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:27:28,153 INFO L87 Difference]: Start difference. First operand 2332 states and 3083 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:27:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:28,627 INFO L93 Difference]: Finished difference Result 3218 states and 4154 transitions. [2022-11-19 07:27:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:27:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 07:27:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:28,637 INFO L225 Difference]: With dead ends: 3218 [2022-11-19 07:27:28,637 INFO L226 Difference]: Without dead ends: 2165 [2022-11-19 07:27:28,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:27:28,640 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 191 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:28,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 931 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:27:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2022-11-19 07:27:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1968. [2022-11-19 07:27:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1483 states have (on average 1.3452461227242076) internal successors, (1995), 1497 states have internal predecessors, (1995), 297 states have call successors, (297), 188 states have call predecessors, (297), 186 states have return successors, (375), 284 states have call predecessors, (375), 294 states have call successors, (375) [2022-11-19 07:27:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2667 transitions. [2022-11-19 07:27:28,883 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2667 transitions. Word has length 102 [2022-11-19 07:27:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:28,884 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 2667 transitions. [2022-11-19 07:27:28,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:27:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2667 transitions. [2022-11-19 07:27:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 07:27:28,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:28,889 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:27:28,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:29,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:29,095 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -443922339, now seen corresponding path program 1 times [2022-11-19 07:27:29,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462509310] [2022-11-19 07:27:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:29,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:27:29,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462509310] [2022-11-19 07:27:29,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462509310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:29,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:29,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528362308] [2022-11-19 07:27:29,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:29,154 INFO L87 Difference]: Start difference. First operand 1968 states and 2667 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (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 07:27:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:29,671 INFO L93 Difference]: Finished difference Result 4433 states and 6367 transitions. [2022-11-19 07:27:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (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 98 [2022-11-19 07:27:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:29,687 INFO L225 Difference]: With dead ends: 4433 [2022-11-19 07:27:29,688 INFO L226 Difference]: Without dead ends: 3165 [2022-11-19 07:27:29,693 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 07:27:29,694 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 187 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:29,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 293 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2022-11-19 07:27:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 3139. [2022-11-19 07:27:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2374 states have (on average 1.3550968828980623) internal successors, (3217), 2398 states have internal predecessors, (3217), 475 states have call successors, (475), 290 states have call predecessors, (475), 288 states have return successors, (620), 452 states have call predecessors, (620), 472 states have call successors, (620) [2022-11-19 07:27:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4312 transitions. [2022-11-19 07:27:30,110 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4312 transitions. Word has length 98 [2022-11-19 07:27:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:30,110 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 4312 transitions. [2022-11-19 07:27:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (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 07:27:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4312 transitions. [2022-11-19 07:27:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:27:30,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:30,119 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 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] [2022-11-19 07:27:30,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:27:30,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1428879141, now seen corresponding path program 1 times [2022-11-19 07:27:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593244226] [2022-11-19 07:27:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:27:30,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:30,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593244226] [2022-11-19 07:27:30,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593244226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:30,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:30,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:27:30,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106937909] [2022-11-19 07:27:30,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:30,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:27:30,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:30,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:27:30,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:30,179 INFO L87 Difference]: Start difference. First operand 3139 states and 4312 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:27:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:30,691 INFO L93 Difference]: Finished difference Result 3758 states and 5054 transitions. [2022-11-19 07:27:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:27:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-11-19 07:27:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:30,720 INFO L225 Difference]: With dead ends: 3758 [2022-11-19 07:27:30,726 INFO L226 Difference]: Without dead ends: 3138 [2022-11-19 07:27:30,729 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 07:27:30,730 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 251 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:30,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 367 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:27:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-11-19 07:27:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3129. [2022-11-19 07:27:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2364 states have (on average 1.345600676818951) internal successors, (3181), 2388 states have internal predecessors, (3181), 475 states have call successors, (475), 290 states have call predecessors, (475), 288 states have return successors, (620), 452 states have call predecessors, (620), 472 states have call successors, (620) [2022-11-19 07:27:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4276 transitions. [2022-11-19 07:27:31,142 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4276 transitions. Word has length 112 [2022-11-19 07:27:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:31,143 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 4276 transitions. [2022-11-19 07:27:31,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:27:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4276 transitions. [2022-11-19 07:27:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:27:31,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:31,152 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:31,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:27:31,152 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash -972645980, now seen corresponding path program 1 times [2022-11-19 07:27:31,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:31,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481289838] [2022-11-19 07:27:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:31,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:27:31,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:31,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481289838] [2022-11-19 07:27:31,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481289838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:31,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266550355] [2022-11-19 07:27:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:31,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:31,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:27:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:31,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:27:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:27:31,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266550355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:31,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:31,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:27:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280984746] [2022-11-19 07:27:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:27:31,567 INFO L87 Difference]: Start difference. First operand 3129 states and 4276 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:27:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:32,170 INFO L93 Difference]: Finished difference Result 3678 states and 4901 transitions. [2022-11-19 07:27:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:27:32,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 07:27:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:32,184 INFO L225 Difference]: With dead ends: 3678 [2022-11-19 07:27:32,184 INFO L226 Difference]: Without dead ends: 3085 [2022-11-19 07:27:32,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:27:32,187 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 67 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:32,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1047 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:27:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-11-19 07:27:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2993. [2022-11-19 07:27:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2264 states have (on average 1.353356890459364) internal successors, (3064), 2288 states have internal predecessors, (3064), 456 states have call successors, (456), 273 states have call predecessors, (456), 271 states have return successors, (601), 433 states have call predecessors, (601), 453 states have call successors, (601) [2022-11-19 07:27:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4121 transitions. [2022-11-19 07:27:32,541 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4121 transitions. Word has length 112 [2022-11-19 07:27:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:32,542 INFO L495 AbstractCegarLoop]: Abstraction has 2993 states and 4121 transitions. [2022-11-19 07:27:32,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:27:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4121 transitions. [2022-11-19 07:27:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:27:32,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:32,554 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:32,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:32,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash -815043540, now seen corresponding path program 1 times [2022-11-19 07:27:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:32,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831767434] [2022-11-19 07:27:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:27:33,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:33,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831767434] [2022-11-19 07:27:33,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831767434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:33,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364240877] [2022-11-19 07:27:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:33,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:33,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:33,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:27:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:27:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:27:33,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364240877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:33,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:33,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 07:27:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445779676] [2022-11-19 07:27:33,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:27:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:27:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:27:33,249 INFO L87 Difference]: Start difference. First operand 2993 states and 4121 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:27:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:33,826 INFO L93 Difference]: Finished difference Result 3742 states and 4966 transitions. [2022-11-19 07:27:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:27:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 07:27:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:33,840 INFO L225 Difference]: With dead ends: 3742 [2022-11-19 07:27:33,840 INFO L226 Difference]: Without dead ends: 3285 [2022-11-19 07:27:33,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:27:33,843 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 175 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:33,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 922 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2022-11-19 07:27:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 3251. [2022-11-19 07:27:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2426 states have (on average 1.3371805441055236) internal successors, (3244), 2456 states have internal predecessors, (3244), 504 states have call successors, (504), 315 states have call predecessors, (504), 319 states have return successors, (661), 481 states have call predecessors, (661), 501 states have call successors, (661) [2022-11-19 07:27:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4409 transitions. [2022-11-19 07:27:34,289 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4409 transitions. Word has length 113 [2022-11-19 07:27:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:34,292 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 4409 transitions. [2022-11-19 07:27:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:27:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4409 transitions. [2022-11-19 07:27:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:27:34,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:34,301 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:34,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:34,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:34,512 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1427497360, now seen corresponding path program 1 times [2022-11-19 07:27:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:34,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921915169] [2022-11-19 07:27:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:27:34,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921915169] [2022-11-19 07:27:34,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921915169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:34,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:34,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 07:27:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750303020] [2022-11-19 07:27:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:27:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:27:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:27:34,800 INFO L87 Difference]: Start difference. First operand 3251 states and 4409 transitions. Second operand has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-19 07:27:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:35,856 INFO L93 Difference]: Finished difference Result 3930 states and 5172 transitions. [2022-11-19 07:27:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:27:35,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 114 [2022-11-19 07:27:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:35,867 INFO L225 Difference]: With dead ends: 3930 [2022-11-19 07:27:35,867 INFO L226 Difference]: Without dead ends: 3215 [2022-11-19 07:27:35,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:27:35,870 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 437 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:35,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 715 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:27:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-11-19 07:27:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3195. [2022-11-19 07:27:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 2390 states have (on average 1.3389121338912133) internal successors, (3200), 2424 states have internal predecessors, (3200), 489 states have call successors, (489), 303 states have call predecessors, (489), 314 states have return successors, (652), 469 states have call predecessors, (652), 486 states have call successors, (652) [2022-11-19 07:27:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4341 transitions. [2022-11-19 07:27:36,274 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4341 transitions. Word has length 114 [2022-11-19 07:27:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:36,274 INFO L495 AbstractCegarLoop]: Abstraction has 3195 states and 4341 transitions. [2022-11-19 07:27:36,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-19 07:27:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4341 transitions. [2022-11-19 07:27:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:27:36,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:36,283 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:36,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:27:36,283 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2071957745, now seen corresponding path program 1 times [2022-11-19 07:27:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:36,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463322686] [2022-11-19 07:27:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:36,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:27:37,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:37,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463322686] [2022-11-19 07:27:37,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463322686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:37,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92007113] [2022-11-19 07:27:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:37,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:37,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:37,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:37,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:27:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:37,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:27:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:27:38,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:27:40,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92007113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702405390] [2022-11-19 07:27:40,406 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:27:40,406 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:40,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:40,407 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:40,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:00,479 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-19 07:28:00,728 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 143 for LOIs [2022-11-19 07:28:00,772 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 134 for LOIs [2022-11-19 07:28:00,800 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-19 07:28:01,855 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-19 07:28:02,020 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 68 for LOIs [2022-11-19 07:28:02,129 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-19 07:28:02,451 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-19 07:28:02,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:33,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127388#(and (= ~q_req_up~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (<= 1 ~c_dr_st~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:33,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:33,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:33,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 07:28:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259494364] [2022-11-19 07:28:33,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:28:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:33,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:28:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=10567, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 07:28:33,495 INFO L87 Difference]: Start difference. First operand 3195 states and 4341 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 07:28:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:55,828 INFO L93 Difference]: Finished difference Result 4964 states and 6364 transitions. [2022-11-19 07:28:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2022-11-19 07:28:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-19 07:28:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:55,840 INFO L225 Difference]: With dead ends: 4964 [2022-11-19 07:28:55,840 INFO L226 Difference]: Without dead ends: 4305 [2022-11-19 07:28:55,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43388 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=9860, Invalid=96742, Unknown=0, NotChecked=0, Total=106602 [2022-11-19 07:28:55,854 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 4888 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 6972 mSolverCounterSat, 2857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4888 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 9829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2857 IncrementalHoareTripleChecker+Valid, 6972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:55,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4888 Valid, 2742 Invalid, 9829 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2857 Valid, 6972 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 07:28:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2022-11-19 07:28:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3367. [2022-11-19 07:28:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3367 states, 2506 states have (on average 1.3300079808459697) internal successors, (3333), 2542 states have internal predecessors, (3333), 515 states have call successors, (515), 324 states have call predecessors, (515), 344 states have return successors, (688), 502 states have call predecessors, (688), 512 states have call successors, (688) [2022-11-19 07:28:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 4536 transitions. [2022-11-19 07:28:56,254 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 4536 transitions. Word has length 114 [2022-11-19 07:28:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:56,254 INFO L495 AbstractCegarLoop]: Abstraction has 3367 states and 4536 transitions. [2022-11-19 07:28:56,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 07:28:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 4536 transitions. [2022-11-19 07:28:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:28:56,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:56,262 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:56,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:56,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:56,468 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1243881541, now seen corresponding path program 1 times [2022-11-19 07:28:56,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:56,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360353390] [2022-11-19 07:28:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:56,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:28:56,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:56,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360353390] [2022-11-19 07:28:56,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360353390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:56,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715293058] [2022-11-19 07:28:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:56,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:56,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:56,677 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:56,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:28:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:28:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:28:56,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:56,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715293058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:56,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:56,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:28:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380711954] [2022-11-19 07:28:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:56,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:28:56,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:28:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:28:56,855 INFO L87 Difference]: Start difference. First operand 3367 states and 4536 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2022-11-19 07:28:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:57,645 INFO L93 Difference]: Finished difference Result 5755 states and 7987 transitions. [2022-11-19 07:28:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:28:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) Word has length 110 [2022-11-19 07:28:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:57,659 INFO L225 Difference]: With dead ends: 5755 [2022-11-19 07:28:57,659 INFO L226 Difference]: Without dead ends: 3955 [2022-11-19 07:28:57,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:28:57,667 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 198 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:57,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 218 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:28:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2022-11-19 07:28:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3867. [2022-11-19 07:28:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 2937 states have (on average 1.3156281920326864) internal successors, (3864), 2969 states have internal predecessors, (3864), 533 states have call successors, (533), 374 states have call predecessors, (533), 395 states have return successors, (713), 525 states have call predecessors, (713), 530 states have call successors, (713) [2022-11-19 07:28:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 5110 transitions. [2022-11-19 07:28:58,171 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 5110 transitions. Word has length 110 [2022-11-19 07:28:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:58,172 INFO L495 AbstractCegarLoop]: Abstraction has 3867 states and 5110 transitions. [2022-11-19 07:28:58,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2022-11-19 07:28:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 5110 transitions. [2022-11-19 07:28:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:28:58,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:58,181 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:28:58,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:58,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:58,387 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 272206854, now seen corresponding path program 2 times [2022-11-19 07:28:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:58,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104646287] [2022-11-19 07:28:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:28:58,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:58,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104646287] [2022-11-19 07:28:58,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104646287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319370403] [2022-11-19 07:28:58,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:58,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:58,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:28:58,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:28:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:28:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:28:58,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:58,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319370403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:58,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:58,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:28:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300264796] [2022-11-19 07:28:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:58,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:28:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:28:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:28:58,731 INFO L87 Difference]: Start difference. First operand 3867 states and 5110 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, (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) [2022-11-19 07:28:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:59,494 INFO L93 Difference]: Finished difference Result 6636 states and 9159 transitions. [2022-11-19 07:28:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:28:59,499 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, (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) Word has length 110 [2022-11-19 07:28:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:59,516 INFO L225 Difference]: With dead ends: 6636 [2022-11-19 07:28:59,516 INFO L226 Difference]: Without dead ends: 4478 [2022-11-19 07:28:59,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:28:59,526 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 117 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:59,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 437 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:28:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2022-11-19 07:29:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 4402. [2022-11-19 07:29:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 3371 states have (on average 1.312963512310887) internal successors, (4426), 3407 states have internal predecessors, (4426), 592 states have call successors, (592), 417 states have call predecessors, (592), 437 states have return successors, (829), 579 states have call predecessors, (829), 589 states have call successors, (829) [2022-11-19 07:29:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 5847 transitions. [2022-11-19 07:29:00,086 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 5847 transitions. Word has length 110 [2022-11-19 07:29:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:00,087 INFO L495 AbstractCegarLoop]: Abstraction has 4402 states and 5847 transitions. [2022-11-19 07:29:00,087 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, (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) [2022-11-19 07:29:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 5847 transitions. [2022-11-19 07:29:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:29:00,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:00,095 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:00,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:00,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:29:00,301 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -752728803, now seen corresponding path program 1 times [2022-11-19 07:29:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:00,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085022303] [2022-11-19 07:29:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:29:00,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:00,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085022303] [2022-11-19 07:29:00,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085022303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:00,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491459833] [2022-11-19 07:29:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:00,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:00,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:29:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:29:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:29:00,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:29:01,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491459833] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:01,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:29:01,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 07:29:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044583230] [2022-11-19 07:29:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:01,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:29:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:29:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:29:01,108 INFO L87 Difference]: Start difference. First operand 4402 states and 5847 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:29:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:02,392 INFO L93 Difference]: Finished difference Result 5635 states and 7275 transitions. [2022-11-19 07:29:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:29:02,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 07:29:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:02,408 INFO L225 Difference]: With dead ends: 5635 [2022-11-19 07:29:02,408 INFO L226 Difference]: Without dead ends: 4804 [2022-11-19 07:29:02,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:29:02,412 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 314 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:02,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 446 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-11-19 07:29:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4552. [2022-11-19 07:29:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4552 states, 3461 states have (on average 1.30800346720601) internal successors, (4527), 3503 states have internal predecessors, (4527), 621 states have call successors, (621), 436 states have call predecessors, (621), 468 states have return successors, (888), 614 states have call predecessors, (888), 618 states have call successors, (888) [2022-11-19 07:29:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4552 states to 4552 states and 6036 transitions. [2022-11-19 07:29:03,044 INFO L78 Accepts]: Start accepts. Automaton has 4552 states and 6036 transitions. Word has length 115 [2022-11-19 07:29:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:03,045 INFO L495 AbstractCegarLoop]: Abstraction has 4552 states and 6036 transitions. [2022-11-19 07:29:03,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:29:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4552 states and 6036 transitions. [2022-11-19 07:29:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:29:03,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:03,053 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:03,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:03,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:29:03,259 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1900555454, now seen corresponding path program 1 times [2022-11-19 07:29:03,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:03,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216203292] [2022-11-19 07:29:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:03,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:29:03,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:03,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216203292] [2022-11-19 07:29:03,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216203292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:03,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800735201] [2022-11-19 07:29:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:03,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:03,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:03,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:03,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:29:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:29:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:29:03,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:03,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800735201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:03,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:03,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:29:03,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099746231] [2022-11-19 07:29:03,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:03,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:03,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:03,658 INFO L87 Difference]: Start difference. First operand 4552 states and 6036 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:04,777 INFO L93 Difference]: Finished difference Result 9260 states and 12688 transitions. [2022-11-19 07:29:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2022-11-19 07:29:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:04,797 INFO L225 Difference]: With dead ends: 9260 [2022-11-19 07:29:04,798 INFO L226 Difference]: Without dead ends: 5787 [2022-11-19 07:29:04,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:04,808 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 59 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:04,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 372 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2022-11-19 07:29:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 4926. [2022-11-19 07:29:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 3791 states have (on average 1.3292007385914006) internal successors, (5039), 3834 states have internal predecessors, (5039), 643 states have call successors, (643), 458 states have call predecessors, (643), 490 states have return successors, (910), 635 states have call predecessors, (910), 640 states have call successors, (910) [2022-11-19 07:29:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 6592 transitions. [2022-11-19 07:29:05,743 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 6592 transitions. Word has length 111 [2022-11-19 07:29:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:05,743 INFO L495 AbstractCegarLoop]: Abstraction has 4926 states and 6592 transitions. [2022-11-19 07:29:05,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 6592 transitions. [2022-11-19 07:29:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:29:05,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:05,752 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:29:05,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:05,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:05,959 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash -722121199, now seen corresponding path program 1 times [2022-11-19 07:29:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:05,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095943768] [2022-11-19 07:29:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:05,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:29:06,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:06,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095943768] [2022-11-19 07:29:06,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095943768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:06,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301641633] [2022-11-19 07:29:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:06,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:06,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:29:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:29:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:29:06,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:06,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301641633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:06,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:06,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:29:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131018961] [2022-11-19 07:29:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:06,257 INFO L87 Difference]: Start difference. First operand 4926 states and 6592 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:07,038 INFO L93 Difference]: Finished difference Result 7198 states and 9734 transitions. [2022-11-19 07:29:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-19 07:29:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:07,055 INFO L225 Difference]: With dead ends: 7198 [2022-11-19 07:29:07,055 INFO L226 Difference]: Without dead ends: 5480 [2022-11-19 07:29:07,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:07,060 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 61 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:07,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 420 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-11-19 07:29:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5198. [2022-11-19 07:29:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5198 states, 4031 states have (on average 1.3433391218060036) internal successors, (5415), 4074 states have internal predecessors, (5415), 659 states have call successors, (659), 474 states have call predecessors, (659), 506 states have return successors, (926), 651 states have call predecessors, (926), 656 states have call successors, (926) [2022-11-19 07:29:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 7000 transitions. [2022-11-19 07:29:07,721 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 7000 transitions. Word has length 111 [2022-11-19 07:29:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:07,722 INFO L495 AbstractCegarLoop]: Abstraction has 5198 states and 7000 transitions. [2022-11-19 07:29:07,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 7000 transitions. [2022-11-19 07:29:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:29:07,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:07,732 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:29:07,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 07:29:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:29:07,938 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1117525912, now seen corresponding path program 1 times [2022-11-19 07:29:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:07,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285287886] [2022-11-19 07:29:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:29:08,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285287886] [2022-11-19 07:29:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285287886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848208801] [2022-11-19 07:29:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:08,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:08,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:29:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:29:08,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:29:08,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:08,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848208801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:08,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:08,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 07:29:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557066265] [2022-11-19 07:29:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:29:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:29:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:29:08,434 INFO L87 Difference]: Start difference. First operand 5198 states and 7000 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:29:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:09,930 INFO L93 Difference]: Finished difference Result 11232 states and 15430 transitions. [2022-11-19 07:29:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-19 07:29:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:09,954 INFO L225 Difference]: With dead ends: 11232 [2022-11-19 07:29:09,955 INFO L226 Difference]: Without dead ends: 7113 [2022-11-19 07:29:09,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:29:09,965 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 492 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:09,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 389 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-11-19 07:29:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 7109. [2022-11-19 07:29:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 5549 states have (on average 1.3398810596503874) internal successors, (7435), 5602 states have internal predecessors, (7435), 889 states have call successors, (889), 637 states have call predecessors, (889), 669 states have return successors, (1249), 871 states have call predecessors, (1249), 886 states have call successors, (1249) [2022-11-19 07:29:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 9573 transitions. [2022-11-19 07:29:11,193 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 9573 transitions. Word has length 112 [2022-11-19 07:29:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:11,193 INFO L495 AbstractCegarLoop]: Abstraction has 7109 states and 9573 transitions. [2022-11-19 07:29:11,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:29:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 9573 transitions. [2022-11-19 07:29:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:29:11,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:11,204 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:29:11,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:11,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:29:11,410 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2100206014, now seen corresponding path program 1 times [2022-11-19 07:29:11,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:11,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777302782] [2022-11-19 07:29:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:11,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:29:11,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777302782] [2022-11-19 07:29:11,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777302782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095221078] [2022-11-19 07:29:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:11,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:11,500 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:11,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:29:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:11,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:29:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:29:11,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:11,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095221078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:11,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:11,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:29:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814002428] [2022-11-19 07:29:11,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:11,678 INFO L87 Difference]: Start difference. First operand 7109 states and 9573 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:12,825 INFO L93 Difference]: Finished difference Result 12600 states and 17383 transitions. [2022-11-19 07:29:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:12,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-19 07:29:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:12,854 INFO L225 Difference]: With dead ends: 12600 [2022-11-19 07:29:12,854 INFO L226 Difference]: Without dead ends: 8541 [2022-11-19 07:29:12,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:12,871 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 67 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:12,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 426 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2022-11-19 07:29:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 7793. [2022-11-19 07:29:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7793 states, 6145 states have (on average 1.3567127746135068) internal successors, (8337), 6198 states have internal predecessors, (8337), 933 states have call successors, (933), 681 states have call predecessors, (933), 713 states have return successors, (1293), 915 states have call predecessors, (1293), 930 states have call successors, (1293) [2022-11-19 07:29:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7793 states to 7793 states and 10563 transitions. [2022-11-19 07:29:14,502 INFO L78 Accepts]: Start accepts. Automaton has 7793 states and 10563 transitions. Word has length 112 [2022-11-19 07:29:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:14,502 INFO L495 AbstractCegarLoop]: Abstraction has 7793 states and 10563 transitions. [2022-11-19 07:29:14,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7793 states and 10563 transitions. [2022-11-19 07:29:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:29:14,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:14,518 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:14,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:14,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:14,725 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1756154690, now seen corresponding path program 1 times [2022-11-19 07:29:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076160984] [2022-11-19 07:29:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:14,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:29:14,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076160984] [2022-11-19 07:29:14,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076160984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778808029] [2022-11-19 07:29:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:14,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:14,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:14,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:29:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:29:15,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:29:15,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:15,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778808029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:15,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:15,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:29:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88291472] [2022-11-19 07:29:15,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:15,163 INFO L87 Difference]: Start difference. First operand 7793 states and 10563 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:16,279 INFO L93 Difference]: Finished difference Result 12558 states and 17693 transitions. [2022-11-19 07:29:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-19 07:29:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:16,304 INFO L225 Difference]: With dead ends: 12558 [2022-11-19 07:29:16,305 INFO L226 Difference]: Without dead ends: 7815 [2022-11-19 07:29:16,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:16,318 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 98 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:16,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 426 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7815 states. [2022-11-19 07:29:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7815 to 7741. [2022-11-19 07:29:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 6093 states have (on average 1.3334974560971606) internal successors, (8125), 6146 states have internal predecessors, (8125), 933 states have call successors, (933), 681 states have call predecessors, (933), 713 states have return successors, (1293), 915 states have call predecessors, (1293), 930 states have call successors, (1293) [2022-11-19 07:29:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 10351 transitions. [2022-11-19 07:29:17,541 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 10351 transitions. Word has length 113 [2022-11-19 07:29:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:17,542 INFO L495 AbstractCegarLoop]: Abstraction has 7741 states and 10351 transitions. [2022-11-19 07:29:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 10351 transitions. [2022-11-19 07:29:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:29:17,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:17,552 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:17,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:17,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:17,753 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1619632640, now seen corresponding path program 1 times [2022-11-19 07:29:17,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:17,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45881426] [2022-11-19 07:29:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:29:17,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45881426] [2022-11-19 07:29:17,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45881426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209912816] [2022-11-19 07:29:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:17,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:17,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:17,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:17,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:29:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:29:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:29:18,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:18,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209912816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:18,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:18,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 07:29:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894269376] [2022-11-19 07:29:18,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:18,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:29:18,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:29:18,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:18,153 INFO L87 Difference]: Start difference. First operand 7741 states and 10351 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:29:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:20,003 INFO L93 Difference]: Finished difference Result 17403 states and 23494 transitions. [2022-11-19 07:29:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 113 [2022-11-19 07:29:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:20,028 INFO L225 Difference]: With dead ends: 17403 [2022-11-19 07:29:20,029 INFO L226 Difference]: Without dead ends: 10741 [2022-11-19 07:29:20,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:29:20,039 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 395 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:20,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 425 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10741 states. [2022-11-19 07:29:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10741 to 10737. [2022-11-19 07:29:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10737 states, 8467 states have (on average 1.313688437463092) internal successors, (11123), 8535 states have internal predecessors, (11123), 1292 states have call successors, (1292), 944 states have call predecessors, (1292), 976 states have return successors, (1783), 1259 states have call predecessors, (1783), 1289 states have call successors, (1783) [2022-11-19 07:29:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10737 states to 10737 states and 14198 transitions. [2022-11-19 07:29:22,177 INFO L78 Accepts]: Start accepts. Automaton has 10737 states and 14198 transitions. Word has length 113 [2022-11-19 07:29:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:22,178 INFO L495 AbstractCegarLoop]: Abstraction has 10737 states and 14198 transitions. [2022-11-19 07:29:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:29:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 10737 states and 14198 transitions. [2022-11-19 07:29:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:29:22,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:22,188 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:22,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-19 07:29:22,389 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1228472935, now seen corresponding path program 1 times [2022-11-19 07:29:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:22,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551606827] [2022-11-19 07:29:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:22,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:29:22,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551606827] [2022-11-19 07:29:22,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551606827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428343334] [2022-11-19 07:29:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:22,472 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:22,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:29:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:22,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:29:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:29:22,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:22,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428343334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:22,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:22,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:29:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553384748] [2022-11-19 07:29:22,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:22,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:22,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:22,657 INFO L87 Difference]: Start difference. First operand 10737 states and 14198 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:24,334 INFO L93 Difference]: Finished difference Result 19657 states and 26402 transitions. [2022-11-19 07:29:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:24,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 116 [2022-11-19 07:29:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:24,367 INFO L225 Difference]: With dead ends: 19657 [2022-11-19 07:29:24,367 INFO L226 Difference]: Without dead ends: 13213 [2022-11-19 07:29:24,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:24,379 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 72 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:24,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 428 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13213 states. [2022-11-19 07:29:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13213 to 11885. [2022-11-19 07:29:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11885 states, 9439 states have (on average 1.3205848077126814) internal successors, (12465), 9507 states have internal predecessors, (12465), 1380 states have call successors, (1380), 1032 states have call predecessors, (1380), 1064 states have return successors, (1871), 1347 states have call predecessors, (1871), 1377 states have call successors, (1871) [2022-11-19 07:29:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11885 states to 11885 states and 15716 transitions. [2022-11-19 07:29:26,151 INFO L78 Accepts]: Start accepts. Automaton has 11885 states and 15716 transitions. Word has length 116 [2022-11-19 07:29:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:26,152 INFO L495 AbstractCegarLoop]: Abstraction has 11885 states and 15716 transitions. [2022-11-19 07:29:26,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 11885 states and 15716 transitions. [2022-11-19 07:29:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:29:26,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:26,161 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:26,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:26,370 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -38376113, now seen corresponding path program 1 times [2022-11-19 07:29:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566338404] [2022-11-19 07:29:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:26,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:29:26,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566338404] [2022-11-19 07:29:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566338404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963976789] [2022-11-19 07:29:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:26,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:26,510 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:26,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:29:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:29:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:29:26,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:26,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963976789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:26,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:26,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-19 07:29:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940967159] [2022-11-19 07:29:26,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:26,675 INFO L87 Difference]: Start difference. First operand 11885 states and 15716 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:29:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:28,299 INFO L93 Difference]: Finished difference Result 17580 states and 23185 transitions. [2022-11-19 07:29:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:28,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 117 [2022-11-19 07:29:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:28,328 INFO L225 Difference]: With dead ends: 17580 [2022-11-19 07:29:28,328 INFO L226 Difference]: Without dead ends: 12358 [2022-11-19 07:29:28,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:28,338 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 200 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:28,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 596 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2022-11-19 07:29:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 12127. [2022-11-19 07:29:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12127 states, 9634 states have (on average 1.318040274029479) internal successors, (12698), 9720 states have internal predecessors, (12698), 1387 states have call successors, (1387), 1036 states have call predecessors, (1387), 1104 states have return successors, (1932), 1372 states have call predecessors, (1932), 1384 states have call successors, (1932) [2022-11-19 07:29:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12127 states to 12127 states and 16017 transitions. [2022-11-19 07:29:30,368 INFO L78 Accepts]: Start accepts. Automaton has 12127 states and 16017 transitions. Word has length 117 [2022-11-19 07:29:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:30,368 INFO L495 AbstractCegarLoop]: Abstraction has 12127 states and 16017 transitions. [2022-11-19 07:29:30,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:29:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 12127 states and 16017 transitions. [2022-11-19 07:29:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-19 07:29:30,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:30,377 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:30,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:30,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:30,578 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash -240534272, now seen corresponding path program 1 times [2022-11-19 07:29:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:30,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853488169] [2022-11-19 07:29:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:30,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:29:30,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:30,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853488169] [2022-11-19 07:29:30,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853488169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980729886] [2022-11-19 07:29:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:30,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:30,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:30,635 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:30,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:29:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:29:30,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:29:30,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980729886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:30,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:29:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139311535] [2022-11-19 07:29:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:30,787 INFO L87 Difference]: Start difference. First operand 12127 states and 16017 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-19 07:29:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:32,306 INFO L93 Difference]: Finished difference Result 17295 states and 22997 transitions. [2022-11-19 07:29:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:32,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) Word has length 118 [2022-11-19 07:29:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:32,329 INFO L225 Difference]: With dead ends: 17295 [2022-11-19 07:29:32,329 INFO L226 Difference]: Without dead ends: 11869 [2022-11-19 07:29:32,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 119 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 07:29:32,338 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 22 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:32,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11869 states. [2022-11-19 07:29:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11869 to 11869. [2022-11-19 07:29:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11869 states, 9412 states have (on average 1.3178920526986826) internal successors, (12404), 9489 states have internal predecessors, (12404), 1387 states have call successors, (1387), 1036 states have call predecessors, (1387), 1068 states have return successors, (1878), 1345 states have call predecessors, (1878), 1384 states have call successors, (1878) [2022-11-19 07:29:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11869 states to 11869 states and 15669 transitions. [2022-11-19 07:29:33,917 INFO L78 Accepts]: Start accepts. Automaton has 11869 states and 15669 transitions. Word has length 118 [2022-11-19 07:29:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:33,918 INFO L495 AbstractCegarLoop]: Abstraction has 11869 states and 15669 transitions. [2022-11-19 07:29:33,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-19 07:29:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11869 states and 15669 transitions. [2022-11-19 07:29:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-19 07:29:33,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:33,928 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:33,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:34,133 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1046200616, now seen corresponding path program 1 times [2022-11-19 07:29:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:34,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746819050] [2022-11-19 07:29:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:29:34,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:34,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746819050] [2022-11-19 07:29:34,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746819050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:34,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316837528] [2022-11-19 07:29:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:34,252 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:34,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:29:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:29:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:29:34,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316837528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:34,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:34,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:29:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478544406] [2022-11-19 07:29:34,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:34,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:34,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:34,456 INFO L87 Difference]: Start difference. First operand 11869 states and 15669 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:36,208 INFO L93 Difference]: Finished difference Result 20932 states and 28262 transitions. [2022-11-19 07:29:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 118 [2022-11-19 07:29:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:36,234 INFO L225 Difference]: With dead ends: 20932 [2022-11-19 07:29:36,234 INFO L226 Difference]: Without dead ends: 13376 [2022-11-19 07:29:36,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 07:29:36,248 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 172 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:36,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 233 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2022-11-19 07:29:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 13236. [2022-11-19 07:29:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13236 states, 10671 states have (on average 1.2955674257332959) internal successors, (13825), 10748 states have internal predecessors, (13825), 1400 states have call successors, (1400), 1131 states have call predecessors, (1400), 1163 states have return successors, (2067), 1358 states have call predecessors, (2067), 1397 states have call successors, (2067) [2022-11-19 07:29:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13236 states to 13236 states and 17292 transitions. [2022-11-19 07:29:38,177 INFO L78 Accepts]: Start accepts. Automaton has 13236 states and 17292 transitions. Word has length 118 [2022-11-19 07:29:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:38,177 INFO L495 AbstractCegarLoop]: Abstraction has 13236 states and 17292 transitions. [2022-11-19 07:29:38,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 13236 states and 17292 transitions. [2022-11-19 07:29:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-19 07:29:38,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:38,188 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:29:38,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:38,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 07:29:38,394 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -628856568, now seen corresponding path program 1 times [2022-11-19 07:29:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:38,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301691070] [2022-11-19 07:29:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:38,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:29:38,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301691070] [2022-11-19 07:29:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301691070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398161500] [2022-11-19 07:29:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:38,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:38,445 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:38,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:29:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:29:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:29:38,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:38,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398161500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:38,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:38,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:29:38,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008130570] [2022-11-19 07:29:38,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:38,632 INFO L87 Difference]: Start difference. First operand 13236 states and 17292 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:40,696 INFO L93 Difference]: Finished difference Result 21696 states and 29264 transitions. [2022-11-19 07:29:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:40,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 118 [2022-11-19 07:29:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:40,729 INFO L225 Difference]: With dead ends: 21696 [2022-11-19 07:29:40,729 INFO L226 Difference]: Without dead ends: 13213 [2022-11-19 07:29:40,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 119 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 07:29:40,743 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 95 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:40,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13213 states. [2022-11-19 07:29:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13213 to 13060. [2022-11-19 07:29:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13060 states, 10495 states have (on average 1.268318246784183) internal successors, (13311), 10572 states have internal predecessors, (13311), 1400 states have call successors, (1400), 1131 states have call predecessors, (1400), 1163 states have return successors, (2067), 1358 states have call predecessors, (2067), 1397 states have call successors, (2067) [2022-11-19 07:29:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13060 states to 13060 states and 16778 transitions. [2022-11-19 07:29:42,535 INFO L78 Accepts]: Start accepts. Automaton has 13060 states and 16778 transitions. Word has length 118 [2022-11-19 07:29:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:42,535 INFO L495 AbstractCegarLoop]: Abstraction has 13060 states and 16778 transitions. [2022-11-19 07:29:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:29:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13060 states and 16778 transitions. [2022-11-19 07:29:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:29:42,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:42,546 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:42,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-19 07:29:42,746 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash 769379014, now seen corresponding path program 1 times [2022-11-19 07:29:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:42,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435224507] [2022-11-19 07:29:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:29:43,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:43,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435224507] [2022-11-19 07:29:43,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435224507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:43,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955291486] [2022-11-19 07:29:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:43,275 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:43,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:29:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:43,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:29:43,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:29:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:29:44,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955291486] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:44,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:29:44,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 8] total 20 [2022-11-19 07:29:44,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464280662] [2022-11-19 07:29:44,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:29:44,012 INFO L87 Difference]: Start difference. First operand 13060 states and 16778 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:46,163 INFO L93 Difference]: Finished difference Result 25322 states and 32822 transitions. [2022-11-19 07:29:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:29:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-19 07:29:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:46,294 INFO L225 Difference]: With dead ends: 25322 [2022-11-19 07:29:46,294 INFO L226 Difference]: Without dead ends: 14634 [2022-11-19 07:29:46,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:29:46,306 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 197 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 406 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14634 states. [2022-11-19 07:29:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14634 to 14265. [2022-11-19 07:29:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14265 states, 11625 states have (on average 1.2498924731182797) internal successors, (14530), 11711 states have internal predecessors, (14530), 1406 states have call successors, (1406), 1191 states have call predecessors, (1406), 1232 states have return successors, (2034), 1364 states have call predecessors, (2034), 1403 states have call successors, (2034) [2022-11-19 07:29:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14265 states to 14265 states and 17970 transitions. [2022-11-19 07:29:48,149 INFO L78 Accepts]: Start accepts. Automaton has 14265 states and 17970 transitions. Word has length 115 [2022-11-19 07:29:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:48,150 INFO L495 AbstractCegarLoop]: Abstraction has 14265 states and 17970 transitions. [2022-11-19 07:29:48,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14265 states and 17970 transitions. [2022-11-19 07:29:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:29:48,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:48,160 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:48,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:48,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:48,361 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash 68184086, now seen corresponding path program 1 times [2022-11-19 07:29:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:48,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136931135] [2022-11-19 07:29:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:48,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:29:48,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136931135] [2022-11-19 07:29:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136931135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:48,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:48,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:29:48,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349947791] [2022-11-19 07:29:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:48,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:48,529 INFO L87 Difference]: Start difference. First operand 14265 states and 17970 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:52,149 INFO L93 Difference]: Finished difference Result 34603 states and 43770 transitions. [2022-11-19 07:29:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:29:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 116 [2022-11-19 07:29:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:52,192 INFO L225 Difference]: With dead ends: 34603 [2022-11-19 07:29:52,193 INFO L226 Difference]: Without dead ends: 18448 [2022-11-19 07:29:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:52,213 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 130 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:52,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 481 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2022-11-19 07:29:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 17950. [2022-11-19 07:29:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17950 states, 14523 states have (on average 1.2347999724574812) internal successors, (17933), 14666 states have internal predecessors, (17933), 1840 states have call successors, (1840), 1544 states have call predecessors, (1840), 1585 states have return successors, (2660), 1741 states have call predecessors, (2660), 1837 states have call successors, (2660) [2022-11-19 07:29:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17950 states to 17950 states and 22433 transitions. [2022-11-19 07:29:54,708 INFO L78 Accepts]: Start accepts. Automaton has 17950 states and 22433 transitions. Word has length 116 [2022-11-19 07:29:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:54,708 INFO L495 AbstractCegarLoop]: Abstraction has 17950 states and 22433 transitions. [2022-11-19 07:29:54,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:29:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 17950 states and 22433 transitions. [2022-11-19 07:29:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:29:54,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:54,718 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:54,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-19 07:29:54,718 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1950303612, now seen corresponding path program 1 times [2022-11-19 07:29:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076001813] [2022-11-19 07:29:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:29:54,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076001813] [2022-11-19 07:29:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076001813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389351401] [2022-11-19 07:29:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:54,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:54,873 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:54,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:29:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:29:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:55,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:55,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389351401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:55,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:55,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:29:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138444343] [2022-11-19 07:29:55,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:55,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:29:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:29:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:55,072 INFO L87 Difference]: Start difference. First operand 17950 states and 22433 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:29:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:59,028 INFO L93 Difference]: Finished difference Result 34327 states and 43298 transitions. [2022-11-19 07:29:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 117 [2022-11-19 07:29:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:59,069 INFO L225 Difference]: With dead ends: 34327 [2022-11-19 07:29:59,069 INFO L226 Difference]: Without dead ends: 22824 [2022-11-19 07:29:59,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:29:59,083 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 244 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:59,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 555 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22824 states. [2022-11-19 07:30:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22824 to 21615. [2022-11-19 07:30:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21615 states, 17455 states have (on average 1.2252649670581495) internal successors, (21387), 17621 states have internal predecessors, (21387), 2250 states have call successors, (2250), 1867 states have call predecessors, (2250), 1908 states have return successors, (3461), 2128 states have call predecessors, (3461), 2247 states have call successors, (3461) [2022-11-19 07:30:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21615 states to 21615 states and 27098 transitions. [2022-11-19 07:30:02,184 INFO L78 Accepts]: Start accepts. Automaton has 21615 states and 27098 transitions. Word has length 117 [2022-11-19 07:30:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:02,185 INFO L495 AbstractCegarLoop]: Abstraction has 21615 states and 27098 transitions. [2022-11-19 07:30:02,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:30:02,185 INFO L276 IsEmpty]: Start isEmpty. Operand 21615 states and 27098 transitions. [2022-11-19 07:30:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:30:02,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:02,194 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:02,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:02,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 07:30:02,394 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash -407034667, now seen corresponding path program 1 times [2022-11-19 07:30:02,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:02,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637541987] [2022-11-19 07:30:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:30:02,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:02,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637541987] [2022-11-19 07:30:02,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637541987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:02,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872551717] [2022-11-19 07:30:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:02,862 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:02,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:30:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:30:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:30:03,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:30:03,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872551717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444453591] [2022-11-19 07:30:03,503 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:30:03,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:03,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:03,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:03,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:14,585 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 75 for LOIs [2022-11-19 07:30:14,590 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 128 for LOIs [2022-11-19 07:30:14,638 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 136 for LOIs [2022-11-19 07:30:14,687 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 153 for LOIs [2022-11-19 07:30:14,714 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 82 for LOIs [2022-11-19 07:30:15,084 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 128 for LOIs [2022-11-19 07:30:16,272 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 153 for LOIs [2022-11-19 07:30:16,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:41,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '776283#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:30:41,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:41,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:41,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 20 [2022-11-19 07:30:41,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370593756] [2022-11-19 07:30:41,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:41,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:30:41,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:30:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4158, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:30:41,486 INFO L87 Difference]: Start difference. First operand 21615 states and 27098 transitions. Second operand has 20 states, 16 states have (on average 9.5) internal successors, (152), 18 states have internal predecessors, (152), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-19 07:30:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:47,601 INFO L93 Difference]: Finished difference Result 39851 states and 50053 transitions. [2022-11-19 07:30:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-19 07:30:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 9.5) internal successors, (152), 18 states have internal predecessors, (152), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 121 [2022-11-19 07:30:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:47,638 INFO L225 Difference]: With dead ends: 39851 [2022-11-19 07:30:47,638 INFO L226 Difference]: Without dead ends: 19267 [2022-11-19 07:30:47,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 332 SyntacticMatches, 19 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=1100, Invalid=14902, Unknown=0, NotChecked=0, Total=16002 [2022-11-19 07:30:47,663 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1603 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:47,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1624 Valid, 2958 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:30:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19267 states. [2022-11-19 07:30:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19267 to 14510. [2022-11-19 07:30:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14510 states, 11721 states have (on average 1.2115860421465745) internal successors, (14201), 11832 states have internal predecessors, (14201), 1453 states have call successors, (1453), 1280 states have call predecessors, (1453), 1334 states have return successors, (1918), 1398 states have call predecessors, (1918), 1450 states have call successors, (1918) [2022-11-19 07:30:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14510 states to 14510 states and 17572 transitions. [2022-11-19 07:30:49,894 INFO L78 Accepts]: Start accepts. Automaton has 14510 states and 17572 transitions. Word has length 121 [2022-11-19 07:30:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:49,894 INFO L495 AbstractCegarLoop]: Abstraction has 14510 states and 17572 transitions. [2022-11-19 07:30:49,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 9.5) internal successors, (152), 18 states have internal predecessors, (152), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-19 07:30:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 14510 states and 17572 transitions. [2022-11-19 07:30:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:30:49,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:49,899 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:49,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:50,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 07:30:50,100 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:50,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1089293221, now seen corresponding path program 1 times [2022-11-19 07:30:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:50,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137330040] [2022-11-19 07:30:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:50,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:30:50,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137330040] [2022-11-19 07:30:50,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137330040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692651714] [2022-11-19 07:30:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:50,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:50,875 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:50,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:30:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:30:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:30:51,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:30:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692651714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119938824] [2022-11-19 07:30:53,872 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:30:53,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:53,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:53,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:53,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:00,362 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-19 07:31:00,751 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 140 for LOIs [2022-11-19 07:31:00,774 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2022-11-19 07:31:00,782 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-19 07:31:01,804 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-19 07:31:01,968 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 70 for LOIs [2022-11-19 07:31:02,079 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-19 07:31:02,588 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-19 07:31:02,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:33,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '851916#(and (= ~q_req_up~0 1) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (<= 2 ~E_2~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:33,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:33,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:33,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 07:31:33,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638832378] [2022-11-19 07:31:33,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 07:31:33,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 07:31:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:31:33,772 INFO L87 Difference]: Start difference. First operand 14510 states and 17572 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 07:31:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:52,548 INFO L93 Difference]: Finished difference Result 16428 states and 19852 transitions. [2022-11-19 07:31:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-19 07:31:52,548 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-19 07:31:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:52,583 INFO L225 Difference]: With dead ends: 16428 [2022-11-19 07:31:52,583 INFO L226 Difference]: Without dead ends: 15447 [2022-11-19 07:31:52,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 314 SyntacticMatches, 6 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24255 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=6296, Invalid=55456, Unknown=0, NotChecked=0, Total=61752 [2022-11-19 07:31:52,596 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 5230 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 8445 mSolverCounterSat, 3890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5230 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 12335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3890 IncrementalHoareTripleChecker+Valid, 8445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:52,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5230 Valid, 3022 Invalid, 12335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3890 Valid, 8445 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 07:31:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15447 states. [2022-11-19 07:31:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15447 to 14226. [2022-11-19 07:31:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14226 states, 11545 states have (on average 1.2129060199220443) internal successors, (14003), 11644 states have internal predecessors, (14003), 1405 states have call successors, (1405), 1240 states have call predecessors, (1405), 1274 states have return successors, (1834), 1342 states have call predecessors, (1834), 1402 states have call successors, (1834) [2022-11-19 07:31:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14226 states to 14226 states and 17242 transitions. [2022-11-19 07:31:54,774 INFO L78 Accepts]: Start accepts. Automaton has 14226 states and 17242 transitions. Word has length 124 [2022-11-19 07:31:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:54,774 INFO L495 AbstractCegarLoop]: Abstraction has 14226 states and 17242 transitions. [2022-11-19 07:31:54,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 07:31:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14226 states and 17242 transitions. [2022-11-19 07:31:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:31:54,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:54,780 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:54,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-19 07:31:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:54,980 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1305176617, now seen corresponding path program 1 times [2022-11-19 07:31:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:54,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576511544] [2022-11-19 07:31:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:31:55,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:55,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576511544] [2022-11-19 07:31:55,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576511544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:55,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947590758] [2022-11-19 07:31:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:55,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:55,155 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:55,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:31:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:31:55,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:31:55,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:31:55,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947590758] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:55,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:31:55,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 07:31:55,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380462411] [2022-11-19 07:31:55,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:55,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:31:55,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:31:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:31:55,641 INFO L87 Difference]: Start difference. First operand 14226 states and 17242 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:31:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:58,578 INFO L93 Difference]: Finished difference Result 14679 states and 17751 transitions. [2022-11-19 07:31:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:31:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 07:31:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:58,602 INFO L225 Difference]: With dead ends: 14679 [2022-11-19 07:31:58,602 INFO L226 Difference]: Without dead ends: 13982 [2022-11-19 07:31:58,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:31:58,607 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 391 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:58,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 497 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:31:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13982 states. [2022-11-19 07:32:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13982 to 13952. [2022-11-19 07:32:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13952 states, 11341 states have (on average 1.2129441848161537) internal successors, (13756), 11440 states have internal predecessors, (13756), 1369 states have call successors, (1369), 1210 states have call predecessors, (1369), 1240 states have return successors, (1793), 1302 states have call predecessors, (1793), 1366 states have call successors, (1793) [2022-11-19 07:32:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13952 states to 13952 states and 16918 transitions. [2022-11-19 07:32:00,831 INFO L78 Accepts]: Start accepts. Automaton has 13952 states and 16918 transitions. Word has length 125 [2022-11-19 07:32:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:00,831 INFO L495 AbstractCegarLoop]: Abstraction has 13952 states and 16918 transitions. [2022-11-19 07:32:00,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:32:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 13952 states and 16918 transitions. [2022-11-19 07:32:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:32:00,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:00,837 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:00,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:01,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-19 07:32:01,038 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 23509147, now seen corresponding path program 1 times [2022-11-19 07:32:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368404981] [2022-11-19 07:32:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:32:01,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368404981] [2022-11-19 07:32:01,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368404981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972647458] [2022-11-19 07:32:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:01,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:01,226 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:01,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:32:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:32:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:32:01,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:32:01,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972647458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:32:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355089111] [2022-11-19 07:32:01,820 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2022-11-19 07:32:01,820 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:32:01,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:32:01,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:32:01,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:32:07,497 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 76 for LOIs [2022-11-19 07:32:07,501 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 192 for LOIs [2022-11-19 07:32:21,670 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 128 for LOIs [2022-11-19 07:32:21,699 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 203 for LOIs [2022-11-19 07:32:21,766 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 82 for LOIs [2022-11-19 07:32:21,905 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 128 for LOIs [2022-11-19 07:32:22,928 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 235 for LOIs [2022-11-19 07:32:25,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:46,682 WARN L233 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 446 DAG size of output: 316 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:00,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '934762#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:33:00,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:33:00,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:33:00,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 16 [2022-11-19 07:33:00,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277248984] [2022-11-19 07:33:00,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:33:00,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:33:00,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:33:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=4077, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:33:00,708 INFO L87 Difference]: Start difference. First operand 13952 states and 16918 transitions. Second operand has 16 states, 13 states have (on average 10.153846153846153) internal successors, (132), 14 states have internal predecessors, (132), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-19 07:33:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:06,578 INFO L93 Difference]: Finished difference Result 25130 states and 30810 transitions. [2022-11-19 07:33:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-19 07:33:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 10.153846153846153) internal successors, (132), 14 states have internal predecessors, (132), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 124 [2022-11-19 07:33:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:06,611 INFO L225 Difference]: With dead ends: 25130 [2022-11-19 07:33:06,612 INFO L226 Difference]: Without dead ends: 13755 [2022-11-19 07:33:06,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7683 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=1391, Invalid=17241, Unknown=0, NotChecked=0, Total=18632 [2022-11-19 07:33:06,626 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1210 mSDsluCounter, 3621 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 4128 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:06,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 4128 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:33:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13755 states. [2022-11-19 07:33:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13755 to 10237. [2022-11-19 07:33:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10237 states, 8388 states have (on average 1.2156652360515021) internal successors, (10197), 8457 states have internal predecessors, (10197), 942 states have call successors, (942), 879 states have call predecessors, (942), 905 states have return successors, (1280), 901 states have call predecessors, (1280), 939 states have call successors, (1280) [2022-11-19 07:33:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 12419 transitions. [2022-11-19 07:33:08,406 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 12419 transitions. Word has length 124 [2022-11-19 07:33:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:08,406 INFO L495 AbstractCegarLoop]: Abstraction has 10237 states and 12419 transitions. [2022-11-19 07:33:08,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 10.153846153846153) internal successors, (132), 14 states have internal predecessors, (132), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-19 07:33:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 12419 transitions. [2022-11-19 07:33:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:33:08,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:08,411 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:08,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:08,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-19 07:33:08,611 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1768100069, now seen corresponding path program 1 times [2022-11-19 07:33:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:08,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804548558] [2022-11-19 07:33:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 07:33:08,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:08,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804548558] [2022-11-19 07:33:08,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804548558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:08,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028474415] [2022-11-19 07:33:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:08,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:08,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:08,819 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:08,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:33:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:33:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:33:09,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:33:09,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028474415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:33:09,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312700152] [2022-11-19 07:33:09,468 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-19 07:33:09,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:33:09,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:33:09,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:33:09,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:33:15,309 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 77 for LOIs [2022-11-19 07:33:15,313 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 192 for LOIs [2022-11-19 07:34:41,975 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 128 for LOIs [2022-11-19 07:34:42,008 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 203 for LOIs [2022-11-19 07:34:42,077 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 82 for LOIs [2022-11-19 07:34:42,213 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 128 for LOIs [2022-11-19 07:34:43,260 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 235 for LOIs [2022-11-19 07:34:45,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:42,737 WARN L233 SmtUtils]: Spent 43.18s on a formula simplification. DAG size of input: 1366 DAG size of output: 917 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:35:58,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '983860#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:58,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:58,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:58,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 17 [2022-11-19 07:35:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680594648] [2022-11-19 07:35:58,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:58,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:35:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:35:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4341, Unknown=0, NotChecked=0, Total=4830 [2022-11-19 07:35:58,976 INFO L87 Difference]: Start difference. First operand 10237 states and 12419 transitions. Second operand has 17 states, 14 states have (on average 9.714285714285714) internal successors, (136), 15 states have internal predecessors, (136), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-19 07:36:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:04,715 INFO L93 Difference]: Finished difference Result 17769 states and 21596 transitions. [2022-11-19 07:36:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-19 07:36:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.714285714285714) internal successors, (136), 15 states have internal predecessors, (136), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 126 [2022-11-19 07:36:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:04,739 INFO L225 Difference]: With dead ends: 17769 [2022-11-19 07:36:04,739 INFO L226 Difference]: Without dead ends: 10650 [2022-11-19 07:36:04,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 361 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9947 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=1704, Invalid=22166, Unknown=0, NotChecked=0, Total=23870 [2022-11-19 07:36:04,749 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1147 mSDsluCounter, 2893 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:04,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 3331 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:36:04,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10650 states. [2022-11-19 07:36:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10650 to 8554. [2022-11-19 07:36:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8554 states, 7005 states have (on average 1.2052819414703784) internal successors, (8443), 7070 states have internal predecessors, (8443), 779 states have call successors, (779), 740 states have call predecessors, (779), 768 states have return successors, (1093), 744 states have call predecessors, (1093), 776 states have call successors, (1093) [2022-11-19 07:36:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8554 states to 8554 states and 10315 transitions. [2022-11-19 07:36:06,575 INFO L78 Accepts]: Start accepts. Automaton has 8554 states and 10315 transitions. Word has length 126 [2022-11-19 07:36:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:06,576 INFO L495 AbstractCegarLoop]: Abstraction has 8554 states and 10315 transitions. [2022-11-19 07:36:06,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.714285714285714) internal successors, (136), 15 states have internal predecessors, (136), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-19 07:36:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8554 states and 10315 transitions. [2022-11-19 07:36:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-19 07:36:06,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:06,580 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:06,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:06,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:06,780 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1201731486, now seen corresponding path program 1 times [2022-11-19 07:36:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606885442] [2022-11-19 07:36:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:36:07,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606885442] [2022-11-19 07:36:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606885442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825687145] [2022-11-19 07:36:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:07,405 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:07,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:36:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:36:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:36:07,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:36:08,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825687145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034203011] [2022-11-19 07:36:08,697 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-11-19 07:36:08,698 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:08,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:08,698 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:08,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:34,746 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 78 for LOIs [2022-11-19 07:36:34,750 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 126 for LOIs [2022-11-19 07:36:34,787 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 73 for LOIs [2022-11-19 07:36:34,796 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 153 for LOIs [2022-11-19 07:36:34,823 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 82 for LOIs [2022-11-19 07:36:34,969 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 73 for LOIs [2022-11-19 07:36:35,600 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 126 for LOIs [2022-11-19 07:36:35,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:37:05,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1020449#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:37:05,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:37:05,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:37:05,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-11-19 07:37:05,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62822028] [2022-11-19 07:37:05,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:37:05,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:37:05,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:37:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=8140, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:37:05,999 INFO L87 Difference]: Start difference. First operand 8554 states and 10315 transitions. Second operand has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-19 07:37:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:16,235 INFO L93 Difference]: Finished difference Result 19478 states and 23864 transitions. [2022-11-19 07:37:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-19 07:37:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 128 [2022-11-19 07:37:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:16,259 INFO L225 Difference]: With dead ends: 19478 [2022-11-19 07:37:16,259 INFO L226 Difference]: Without dead ends: 12961 [2022-11-19 07:37:16,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 314 SyntacticMatches, 17 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10230 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=2374, Invalid=22118, Unknown=0, NotChecked=0, Total=24492 [2022-11-19 07:37:16,270 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8151 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 4147 mSolverCounterSat, 3371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8151 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 7518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3371 IncrementalHoareTripleChecker+Valid, 4147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:16,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8151 Valid, 1519 Invalid, 7518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3371 Valid, 4147 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:37:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12961 states. [2022-11-19 07:37:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12961 to 7818. [2022-11-19 07:37:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7818 states, 6399 states have (on average 1.202687919987498) internal successors, (7696), 6457 states have internal predecessors, (7696), 726 states have call successors, (726), 685 states have call predecessors, (726), 691 states have return successors, (914), 676 states have call predecessors, (914), 723 states have call successors, (914) [2022-11-19 07:37:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7818 states to 7818 states and 9336 transitions. [2022-11-19 07:37:17,879 INFO L78 Accepts]: Start accepts. Automaton has 7818 states and 9336 transitions. Word has length 128 [2022-11-19 07:37:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:17,880 INFO L495 AbstractCegarLoop]: Abstraction has 7818 states and 9336 transitions. [2022-11-19 07:37:17,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-19 07:37:17,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7818 states and 9336 transitions. [2022-11-19 07:37:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:37:17,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:17,883 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:17,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:18,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:18,083 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1673283384, now seen corresponding path program 1 times [2022-11-19 07:37:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:18,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945081815] [2022-11-19 07:37:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:37:18,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945081815] [2022-11-19 07:37:18,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945081815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:37:18,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545290106] [2022-11-19 07:37:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:18,216 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:18,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:37:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:37:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:37:18,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:18,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545290106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:18,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:37:18,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:37:18,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378391978] [2022-11-19 07:37:18,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:18,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:37:18,454 INFO L87 Difference]: Start difference. First operand 7818 states and 9336 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:37:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:20,107 INFO L93 Difference]: Finished difference Result 14867 states and 18189 transitions. [2022-11-19 07:37:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 142 [2022-11-19 07:37:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:20,122 INFO L225 Difference]: With dead ends: 14867 [2022-11-19 07:37:20,123 INFO L226 Difference]: Without dead ends: 8174 [2022-11-19 07:37:20,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 07:37:20,133 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 173 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:20,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 230 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:37:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8174 states. [2022-11-19 07:37:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8174 to 7950. [2022-11-19 07:37:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 6523 states have (on average 1.1816648781235628) internal successors, (7708), 6581 states have internal predecessors, (7708), 726 states have call successors, (726), 693 states have call predecessors, (726), 699 states have return successors, (928), 676 states have call predecessors, (928), 723 states have call successors, (928) [2022-11-19 07:37:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 9362 transitions. [2022-11-19 07:37:21,800 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 9362 transitions. Word has length 142 [2022-11-19 07:37:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:21,800 INFO L495 AbstractCegarLoop]: Abstraction has 7950 states and 9362 transitions. [2022-11-19 07:37:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:37:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 9362 transitions. [2022-11-19 07:37:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:37:21,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:21,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:21,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:22,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:22,005 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:22,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2068906770, now seen corresponding path program 1 times [2022-11-19 07:37:22,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:22,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241274879] [2022-11-19 07:37:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:22,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:37:22,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:22,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241274879] [2022-11-19 07:37:22,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241274879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:37:22,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781125050] [2022-11-19 07:37:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:22,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:22,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:22,203 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:22,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 07:37:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:37:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:37:22,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781125050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:22,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:37:22,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:37:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195335247] [2022-11-19 07:37:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:37:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:22,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:37:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:37:22,430 INFO L87 Difference]: Start difference. First operand 7950 states and 9362 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:37:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:24,751 INFO L93 Difference]: Finished difference Result 15347 states and 18037 transitions. [2022-11-19 07:37:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:37:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 145 [2022-11-19 07:37:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:24,765 INFO L225 Difference]: With dead ends: 15347 [2022-11-19 07:37:24,765 INFO L226 Difference]: Without dead ends: 8595 [2022-11-19 07:37:24,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:37:24,771 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 261 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:24,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 644 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:37:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2022-11-19 07:37:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 7523. [2022-11-19 07:37:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7523 states, 6096 states have (on average 1.156496062992126) internal successors, (7050), 6132 states have internal predecessors, (7050), 735 states have call successors, (735), 684 states have call predecessors, (735), 690 states have return successors, (905), 707 states have call predecessors, (905), 732 states have call successors, (905) [2022-11-19 07:37:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7523 states to 7523 states and 8690 transitions. [2022-11-19 07:37:26,329 INFO L78 Accepts]: Start accepts. Automaton has 7523 states and 8690 transitions. Word has length 145 [2022-11-19 07:37:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 7523 states and 8690 transitions. [2022-11-19 07:37:26,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:37:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7523 states and 8690 transitions. [2022-11-19 07:37:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-19 07:37:26,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:26,333 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:26,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-19 07:37:26,534 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1696089831, now seen corresponding path program 1 times [2022-11-19 07:37:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:26,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941344935] [2022-11-19 07:37:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-19 07:37:26,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:26,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941344935] [2022-11-19 07:37:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941344935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:26,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:26,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:37:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559259533] [2022-11-19 07:37:26,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:37:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:37:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:37:26,759 INFO L87 Difference]: Start difference. First operand 7523 states and 8690 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:37:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:31,739 INFO L93 Difference]: Finished difference Result 23618 states and 27405 transitions. [2022-11-19 07:37:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:37:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 174 [2022-11-19 07:37:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:31,769 INFO L225 Difference]: With dead ends: 23618 [2022-11-19 07:37:31,769 INFO L226 Difference]: Without dead ends: 18980 [2022-11-19 07:37:31,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 07:37:31,777 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 464 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:31,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1369 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:37:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18980 states. [2022-11-19 07:37:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18980 to 12583. [2022-11-19 07:37:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12583 states, 10182 states have (on average 1.1571400510705165) internal successors, (11782), 10230 states have internal predecessors, (11782), 1241 states have call successors, (1241), 1136 states have call predecessors, (1241), 1158 states have return successors, (1533), 1217 states have call predecessors, (1533), 1238 states have call successors, (1533) [2022-11-19 07:37:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12583 states to 12583 states and 14556 transitions. [2022-11-19 07:37:34,635 INFO L78 Accepts]: Start accepts. Automaton has 12583 states and 14556 transitions. Word has length 174 [2022-11-19 07:37:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:34,636 INFO L495 AbstractCegarLoop]: Abstraction has 12583 states and 14556 transitions. [2022-11-19 07:37:34,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:37:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 12583 states and 14556 transitions. [2022-11-19 07:37:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-19 07:37:34,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:34,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-19 07:37:34,642 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2052319828, now seen corresponding path program 1 times [2022-11-19 07:37:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013050547] [2022-11-19 07:37:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:37:34,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:37:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:37:34,830 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:37:34,831 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:37:34,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-19 07:37:34,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-19 07:37:34,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-19 07:37:34,839 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:34,844 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:37:35,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:37:35 BoogieIcfgContainer [2022-11-19 07:37:35,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:37:35,068 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:37:35,068 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:37:35,068 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:37:35,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:58" (3/4) ... [2022-11-19 07:37:35,073 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:37:35,259 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:37:35,260 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:37:35,260 INFO L158 Benchmark]: Toolchain (without parser) took 638472.86ms. Allocated memory was 104.9MB in the beginning and 4.5GB in the end (delta: 4.4GB). Free memory was 64.3MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-19 07:37:35,260 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:37:35,260 INFO L158 Benchmark]: CACSL2BoogieTranslator took 478.42ms. Allocated memory is still 104.9MB. Free memory was 64.1MB in the beginning and 74.4MB in the end (delta: -10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:37:35,261 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.38ms. Allocated memory is still 104.9MB. Free memory was 74.4MB in the beginning and 71.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:37:35,261 INFO L158 Benchmark]: Boogie Preprocessor took 64.76ms. Allocated memory is still 104.9MB. Free memory was 71.5MB in the beginning and 68.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:37:35,261 INFO L158 Benchmark]: RCFGBuilder took 1335.48ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 68.5MB in the beginning and 76.9MB in the end (delta: -8.4MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. [2022-11-19 07:37:35,262 INFO L158 Benchmark]: TraceAbstraction took 636325.92ms. Allocated memory was 142.6MB in the beginning and 4.5GB in the end (delta: 4.4GB). Free memory was 76.1MB in the beginning and 3.2GB in the end (delta: -3.2GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-11-19 07:37:35,262 INFO L158 Benchmark]: Witness Printer took 191.80ms. Allocated memory is still 4.5GB. Free memory was 3.2GB in the beginning and 3.2GB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-19 07:37:35,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 478.42ms. Allocated memory is still 104.9MB. Free memory was 64.1MB in the beginning and 74.4MB in the end (delta: -10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.38ms. Allocated memory is still 104.9MB. Free memory was 74.4MB in the beginning and 71.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.76ms. Allocated memory is still 104.9MB. Free memory was 71.5MB in the beginning and 68.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1335.48ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 68.5MB in the beginning and 76.9MB in the end (delta: -8.4MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. * TraceAbstraction took 636325.92ms. Allocated memory was 142.6MB in the beginning and 4.5GB in the end (delta: 4.4GB). Free memory was 76.1MB in the beginning and 3.2GB in the end (delta: -3.2GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Witness Printer took 191.80ms. Allocated memory is still 4.5GB. Free memory was 3.2GB in the beginning and 3.2GB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 496]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L504] int m_st ; [L514] int T2_E = 2; [L515] int T3_E = 2; [L34] int q_free ; [L513] int T1_E = 2; [L35] int q_read_ev ; [L503] int t3_pc = 0; [L37] int q_req_up ; [L38] int q_ev ; [L66] int c_dr_st ; [L68] int c_dr_i ; [L33] int q_buf_0 ; [L527] int local ; [L501] int t1_pc = 0; [L59] int p_num_write ; [L509] int t1_i ; [L512] int M_E = 2; [L516] int E_M = 2; [L508] int m_i ; [L172] static int a_t ; [L505] int t1_st ; [L507] int t3_st ; [L511] int t3_i ; [L510] int t2_i ; [L36] int q_write_ev ; [L62] int p_dw_pc ; [L63] int p_dw_i ; [L502] int t2_pc = 0; [L525] int token ; [L61] int p_dw_st ; [L65] int c_last_read ; [L67] int c_dr_pc ; [L517] int E_1 = 2; [L500] int m_pc = 0; [L506] int t2_st ; [L519] int E_3 = 2; [L518] int E_2 = 2; [L60] int p_last_write ; [L64] int c_num_read ; [L1224] COND FALSE !(__VERIFIER_nondet_int()) [L1227] CALL main2() [L1211] int __retres1 ; [L1215] CALL init_model2() [L1124] m_i = 1 [L1125] t1_i = 1 [L1126] t2_i = 1 [L1127] t3_i = 1 [L1215] RET init_model2() [L1216] CALL start_simulation2() [L1152] int kernel_st ; [L1153] int tmp ; [L1154] int tmp___0 ; [L1158] kernel_st = 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L1159] FCALL update_channels2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L1160] CALL init_threads2() [L780] COND TRUE m_i == 1 [L781] m_st = 0 [L785] COND TRUE t1_i == 1 [L786] t1_st = 0 [L790] COND TRUE t2_i == 1 [L791] t2_st = 0 [L795] COND TRUE t3_i == 1 [L796] t3_st = 0 [L1160] RET init_threads2() [L1161] CALL fire_delta_events2() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_3)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, \old(T3_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L917] COND FALSE !(M_E == 0) [L922] COND FALSE !(T1_E == 0) [L927] COND FALSE !(T2_E == 0) [L932] COND FALSE !(T3_E == 0) [L937] COND FALSE !(E_M == 0) [L942] COND FALSE !(E_1 == 0) [L947] COND FALSE !(E_2 == 0) [L952] COND FALSE !(E_3 == 0) [L1161] RET fire_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L1162] CALL activate_threads2() VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L1010] int tmp ; [L1011] int tmp___0 ; [L1012] int tmp___1 ; [L1013] int tmp___2 ; [L1017] CALL, EXPR is_master_triggered() [L693] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L696] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L706] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L708] return (__retres1); [L1017] RET, EXPR is_master_triggered() [L1017] tmp = is_master_triggered() [L1019] COND FALSE !(\read(tmp)) [L1025] CALL, EXPR is_transmit1_triggered() [L712] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L715] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L725] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L727] return (__retres1); [L1025] RET, EXPR is_transmit1_triggered() [L1025] tmp___0 = is_transmit1_triggered() [L1027] COND FALSE !(\read(tmp___0)) [L1033] CALL, EXPR is_transmit2_triggered() [L731] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L734] COND FALSE !(t2_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L744] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L746] return (__retres1); [L1033] RET, EXPR is_transmit2_triggered() [L1033] tmp___1 = is_transmit2_triggered() [L1035] COND FALSE !(\read(tmp___1)) [L1041] CALL, EXPR is_transmit3_triggered() [L750] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L753] COND FALSE !(t3_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L763] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L765] return (__retres1); [L1041] RET, EXPR is_transmit3_triggered() [L1041] tmp___2 = is_transmit3_triggered() [L1043] COND FALSE !(\read(tmp___2)) [L1162] RET activate_threads2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L1163] CALL reset_delta_events2() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_3)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, \old(T3_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L965] COND FALSE !(M_E == 1) [L970] COND FALSE !(T1_E == 1) [L975] COND FALSE !(T2_E == 1) [L980] COND FALSE !(T3_E == 1) [L985] COND FALSE !(E_M == 1) [L990] COND FALSE !(E_1 == 1) [L995] COND FALSE !(E_2 == 1) [L1000] COND FALSE !(E_3 == 1) [L1163] RET reset_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L1166] COND TRUE 1 [L1169] kernel_st = 1 [L1170] CALL eval2() [L836] int tmp ; VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L840] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L843] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L805] int __retres1 ; [L808] COND TRUE m_st == 0 [L809] __retres1 = 1 [L831] return (__retres1); [L843] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L843] tmp = exists_runnable_thread2() [L845] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, tmp=1, token=0] [L850] COND TRUE m_st == 0 [L851] int tmp_ndt_1; [L852] tmp_ndt_1 = __VERIFIER_nondet_int() [L853] COND FALSE !(\read(tmp_ndt_1)) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, tmp=1, tmp_ndt_1=0, token=0] [L864] COND TRUE t1_st == 0 [L865] int tmp_ndt_2; [L866] tmp_ndt_2 = __VERIFIER_nondet_int() [L867] COND TRUE \read(tmp_ndt_2) [L869] t1_st = 1 [L870] CALL transmit1() [L588] COND TRUE t1_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L599] COND TRUE 1 [L601] t1_pc = 1 [L602] t1_st = 2 [L870] RET transmit1() [L878] COND TRUE t2_st == 0 [L879] int tmp_ndt_3; [L880] tmp_ndt_3 = __VERIFIER_nondet_int() [L881] COND TRUE \read(tmp_ndt_3) [L883] t2_st = 1 [L884] CALL transmit2() [L624] COND TRUE t2_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L635] COND TRUE 1 [L637] t2_pc = 1 [L638] t2_st = 2 [L884] RET transmit2() [L892] COND TRUE t3_st == 0 [L893] int tmp_ndt_4; [L894] tmp_ndt_4 = __VERIFIER_nondet_int() [L895] COND TRUE \read(tmp_ndt_4) [L897] t3_st = 1 [L898] CALL transmit3() [L660] COND TRUE t3_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1, token=0] [L671] COND TRUE 1 [L673] t3_pc = 1 [L674] t3_st = 2 [L898] RET transmit3() [L840] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, tmp_ndt_4=-1, token=0] [L843] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L805] int __retres1 ; [L808] COND TRUE m_st == 0 [L809] __retres1 = 1 [L831] return (__retres1); [L843] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, tmp_ndt_4=-1, token=0] [L843] tmp = exists_runnable_thread2() [L845] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, tmp_ndt_4=-1, token=0] [L850] COND TRUE m_st == 0 [L851] int tmp_ndt_1; [L852] tmp_ndt_1 = __VERIFIER_nondet_int() [L853] COND TRUE \read(tmp_ndt_1) [L855] m_st = 1 [L856] CALL master() [L530] int tmp_var = __VERIFIER_nondet_int(); [L532] COND TRUE m_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L543] COND TRUE 1 [L546] token = __VERIFIER_nondet_int() [L547] local = token [L548] E_1 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L549] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L1057] CALL activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L1010] int tmp ; [L1011] int tmp___0 ; [L1012] int tmp___1 ; [L1013] int tmp___2 ; [L1017] CALL, EXPR is_master_triggered() [L693] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L696] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L706] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L708] return (__retres1); [L1017] RET, EXPR is_master_triggered() [L1017] tmp = is_master_triggered() [L1019] COND FALSE !(\read(tmp)) [L1025] CALL, EXPR is_transmit1_triggered() [L712] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L715] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L716] COND TRUE E_1 == 1 [L717] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L727] return (__retres1); [L1025] RET, EXPR is_transmit1_triggered() [L1025] tmp___0 = is_transmit1_triggered() [L1027] COND TRUE \read(tmp___0) [L1028] t1_st = 0 [L1033] CALL, EXPR is_transmit2_triggered() [L731] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L734] COND TRUE t2_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L735] COND FALSE !(E_2 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L744] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L746] return (__retres1); [L1033] RET, EXPR is_transmit2_triggered() [L1033] tmp___1 = is_transmit2_triggered() [L1035] COND FALSE !(\read(tmp___1)) [L1041] CALL, EXPR is_transmit3_triggered() [L750] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L753] COND TRUE t3_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L754] COND FALSE !(E_3 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L763] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L765] return (__retres1); [L1041] RET, EXPR is_transmit3_triggered() [L1041] tmp___2 = is_transmit3_triggered() [L1043] COND FALSE !(\read(tmp___2)) [L1057] RET activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L549] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L550] E_1 = 2 [L551] m_pc = 1 [L552] m_st = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L856] RET master() [L864] COND TRUE t1_st == 0 [L865] int tmp_ndt_2; [L866] tmp_ndt_2 = __VERIFIER_nondet_int() [L867] COND TRUE \read(tmp_ndt_2) [L869] t1_st = 1 [L870] CALL transmit1() [L588] COND FALSE !(t1_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L591] COND TRUE t1_pc == 1 [L607] token += 1 [L608] E_2 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L609] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L1057] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L1010] int tmp ; [L1011] int tmp___0 ; [L1012] int tmp___1 ; [L1013] int tmp___2 ; [L1017] CALL, EXPR is_master_triggered() [L693] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L696] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L697] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L706] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L708] return (__retres1); [L1017] RET, EXPR is_master_triggered() [L1017] tmp = is_master_triggered() [L1019] COND FALSE !(\read(tmp)) [L1025] CALL, EXPR is_transmit1_triggered() [L712] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L715] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L716] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L725] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L727] return (__retres1); [L1025] RET, EXPR is_transmit1_triggered() [L1025] tmp___0 = is_transmit1_triggered() [L1027] COND FALSE !(\read(tmp___0)) [L1033] CALL, EXPR is_transmit2_triggered() [L731] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L734] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L735] COND TRUE E_2 == 1 [L736] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L746] return (__retres1); [L1033] RET, EXPR is_transmit2_triggered() [L1033] tmp___1 = is_transmit2_triggered() [L1035] COND TRUE \read(tmp___1) [L1036] t2_st = 0 [L1041] CALL, EXPR is_transmit3_triggered() [L750] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L753] COND TRUE t3_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L754] COND FALSE !(E_3 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L763] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L765] return (__retres1); [L1041] RET, EXPR is_transmit3_triggered() [L1041] tmp___2 = is_transmit3_triggered() [L1043] COND FALSE !(\read(tmp___2)) [L1057] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L609] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L610] E_2 = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L599] COND TRUE 1 [L601] t1_pc = 1 [L602] t1_st = 2 [L870] RET transmit1() [L878] COND TRUE t2_st == 0 [L879] int tmp_ndt_3; [L880] tmp_ndt_3 = __VERIFIER_nondet_int() [L881] COND TRUE \read(tmp_ndt_3) [L883] t2_st = 1 [L884] CALL transmit2() [L624] COND FALSE !(t2_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L627] COND TRUE t2_pc == 1 [L643] token += 1 [L644] E_3 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L645] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L1057] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L1010] int tmp ; [L1011] int tmp___0 ; [L1012] int tmp___1 ; [L1013] int tmp___2 ; [L1017] CALL, EXPR is_master_triggered() [L693] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L696] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L697] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L706] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L708] return (__retres1); [L1017] RET, EXPR is_master_triggered() [L1017] tmp = is_master_triggered() [L1019] COND FALSE !(\read(tmp)) [L1025] CALL, EXPR is_transmit1_triggered() [L712] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L715] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L716] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L725] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L727] return (__retres1); [L1025] RET, EXPR is_transmit1_triggered() [L1025] tmp___0 = is_transmit1_triggered() [L1027] COND FALSE !(\read(tmp___0)) [L1033] CALL, EXPR is_transmit2_triggered() [L731] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L734] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L735] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L744] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L746] return (__retres1); [L1033] RET, EXPR is_transmit2_triggered() [L1033] tmp___1 = is_transmit2_triggered() [L1035] COND FALSE !(\read(tmp___1)) [L1041] CALL, EXPR is_transmit3_triggered() [L750] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L753] COND TRUE t3_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L754] COND TRUE E_3 == 1 [L755] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L765] return (__retres1); [L1041] RET, EXPR is_transmit3_triggered() [L1041] tmp___2 = is_transmit3_triggered() [L1043] COND TRUE \read(tmp___2) [L1044] t3_st = 0 [L1057] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0, token=2] [L645] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0, token=2] [L646] E_3 = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0, token=2] [L635] COND TRUE 1 [L637] t2_pc = 1 [L638] t2_st = 2 [L884] RET transmit2() [L892] COND TRUE t3_st == 0 [L893] int tmp_ndt_4; [L894] tmp_ndt_4 = __VERIFIER_nondet_int() [L895] COND TRUE \read(tmp_ndt_4) [L897] t3_st = 1 [L898] CALL transmit3() [L660] COND FALSE !(t3_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=2] [L663] COND TRUE t3_pc == 1 [L679] token += 1 [L680] E_M = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L681] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L1057] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L1010] int tmp ; [L1011] int tmp___0 ; [L1012] int tmp___1 ; [L1013] int tmp___2 ; [L1017] CALL, EXPR is_master_triggered() [L693] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L696] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L697] COND TRUE E_M == 1 [L698] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L708] return (__retres1); [L1017] RET, EXPR is_master_triggered() [L1017] tmp = is_master_triggered() [L1019] COND TRUE \read(tmp) [L1020] m_st = 0 [L1025] CALL, EXPR is_transmit1_triggered() [L712] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L715] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L716] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L725] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L727] return (__retres1); [L1025] RET, EXPR is_transmit1_triggered() [L1025] tmp___0 = is_transmit1_triggered() [L1027] COND FALSE !(\read(tmp___0)) [L1033] CALL, EXPR is_transmit2_triggered() [L731] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L734] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L735] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L744] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L746] return (__retres1); [L1033] RET, EXPR is_transmit2_triggered() [L1033] tmp___1 = is_transmit2_triggered() [L1035] COND FALSE !(\read(tmp___1)) [L1041] CALL, EXPR is_transmit3_triggered() [L750] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L753] COND TRUE t3_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L754] COND FALSE !(E_3 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L763] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L765] return (__retres1); [L1041] RET, EXPR is_transmit3_triggered() [L1041] tmp___2 = is_transmit3_triggered() [L1043] COND FALSE !(\read(tmp___2)) [L1057] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L681] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L682] E_M = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L671] COND TRUE 1 [L673] t3_pc = 1 [L674] t3_st = 2 [L898] RET transmit3() [L840] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=1, tmp_ndt_4=-2, token=3] [L843] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=3] [L805] int __retres1 ; [L808] COND TRUE m_st == 0 [L809] __retres1 = 1 [L831] return (__retres1); [L843] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=1, tmp_ndt_4=-2, token=3] [L843] tmp = exists_runnable_thread2() [L845] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=1, tmp_ndt_4=-2, token=3] [L850] COND TRUE m_st == 0 [L851] int tmp_ndt_1; [L852] tmp_ndt_1 = __VERIFIER_nondet_int() [L853] COND TRUE \read(tmp_ndt_1) [L855] m_st = 1 [L856] CALL master() [L530] int tmp_var = __VERIFIER_nondet_int(); [L532] COND FALSE !(m_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L535] COND TRUE m_pc == 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L557] COND FALSE !(token != local + 3) [L562] COND TRUE tmp_var <= 5 [L563] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L568] COND TRUE tmp_var <= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L569] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L570] COND TRUE tmp_var == 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L571] CALL error2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=3] [L496] reach_error() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=3] - UnprovableResult [Line: 28]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 167 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 636.0s, OverallIterations: 49, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.3s, AutomataDifference: 121.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31628 SdHoareTripleChecker+Valid, 27.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31403 mSDsluCounter, 38566 SdHoareTripleChecker+Invalid, 23.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27633 mSDsCounter, 13008 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35958 IncrementalHoareTripleChecker+Invalid, 48966 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13008 mSolverCounterUnsat, 10933 mSDtfsCounter, 35958 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6808 GetRequests, 5265 SyntacticMatches, 53 SemanticMatches, 1490 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104385 ImplicationChecksByTransitivity, 275.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21615occurred in iteration=39, InterpolantAutomatonStates: 926, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 49.2s AutomataMinimizationTime, 48 MinimizatonAttempts, 33250 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 8552 NumberOfCodeBlocks, 8509 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 9433 ConstructedInterpolants, 0 QuantifiedInterpolants, 22080 SizeOfPredicates, 87 NumberOfNonLiveVariables, 17299 ConjunctsInSsa, 425 ConjunctsInUnsatCore, 89 InterpolantComputations, 41 PerfectInterpolantSequences, 4886/5628 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 07:37:35,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7171319-4c8f-4421-abaf-486e14c26908/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE