./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:04:46,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:04:46,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:04:46,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:04:46,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:04:46,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:04:46,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:04:46,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:04:46,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:04:46,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:04:46,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:04:46,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:04:46,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:04:46,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:04:46,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:04:46,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:04:46,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:04:46,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:04:46,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:04:46,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:04:46,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:04:46,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:04:46,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:04:46,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:04:46,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:04:46,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:04:46,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:04:46,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:04:46,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:04:46,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:04:46,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:04:46,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:04:46,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:04:46,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:04:46,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:04:46,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:04:46,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:04:46,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:04:46,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:04:46,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:04:46,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:04:46,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:04:46,590 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:04:46,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:04:46,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:04:46,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:04:46,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:04:46,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:04:46,593 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:04:46,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:04:46,594 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:04:46,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:04:46,595 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:04:46,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:04:46,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:04:46,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:04:46,596 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:04:46,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:04:46,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:04:46,597 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:04:46,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:04:46,598 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:04:46,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:04:46,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:04:46,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:04:46,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:04:46,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:04:46,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:04:46,599 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:04:46,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:04:46,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:04:46,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:04:46,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:04:46,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:04:46,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:04:46,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:04:46,601 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:04:46,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:04:46,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:04:46,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:04:46,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:04:46,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:04:46,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:04:46,602 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_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e [2022-11-03 02:04:46,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:04:46,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:04:46,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:04:46,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:04:46,979 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:04:46,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2022-11-03 02:04:47,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/data/6686c8f8a/2effe90373d94173a9d9dd7779456710/FLAG52005ee33 [2022-11-03 02:04:47,708 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:04:47,710 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2022-11-03 02:04:47,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/data/6686c8f8a/2effe90373d94173a9d9dd7779456710/FLAG52005ee33 [2022-11-03 02:04:47,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/data/6686c8f8a/2effe90373d94173a9d9dd7779456710 [2022-11-03 02:04:47,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:04:47,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:04:48,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:04:48,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:04:48,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:04:48,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:04:47" (1/1) ... [2022-11-03 02:04:48,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7151532c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48, skipping insertion in model container [2022-11-03 02:04:48,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:04:47" (1/1) ... [2022-11-03 02:04:48,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:04:48,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:04:48,320 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[914,927] [2022-11-03 02:04:48,383 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[7115,7128] [2022-11-03 02:04:48,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:48,498 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:04:48,510 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[914,927] [2022-11-03 02:04:48,546 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[7115,7128] [2022-11-03 02:04:48,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:04:48,692 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:04:48,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48 WrapperNode [2022-11-03 02:04:48,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:04:48,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:04:48,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:04:48,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:04:48,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,775 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1043 [2022-11-03 02:04:48,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:04:48,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:04:48,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:04:48,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:04:48,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,833 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:04:48,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:04:48,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:04:48,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:04:48,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (1/1) ... [2022-11-03 02:04:48,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:04:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:48,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:04:48,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:04:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:04:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:04:48,926 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:04:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:04:48,927 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:04:48,928 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:04:48,928 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:04:48,928 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:04:48,928 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:04:48,929 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:04:48,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:04:48,929 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:04:48,930 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:04:48,930 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:04:48,930 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:04:48,930 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:04:48,930 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:04:48,931 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:04:48,931 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:04:48,931 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:04:48,931 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:04:48,932 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:04:48,932 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:04:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:04:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:04:48,933 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:04:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:04:48,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:04:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:04:48,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:04:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:04:48,937 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:04:48,937 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 02:04:48,937 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 02:04:49,144 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:04:49,147 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:04:50,474 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:04:51,151 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:04:51,152 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-03 02:04:51,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:04:51 BoogieIcfgContainer [2022-11-03 02:04:51,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:04:51,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:04:51,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:04:51,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:04:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:04:47" (1/3) ... [2022-11-03 02:04:51,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53159d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:04:51, skipping insertion in model container [2022-11-03 02:04:51,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:04:48" (2/3) ... [2022-11-03 02:04:51,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53159d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:04:51, skipping insertion in model container [2022-11-03 02:04:51,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:04:51" (3/3) ... [2022-11-03 02:04:51,172 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.14.cil.c [2022-11-03 02:04:51,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:04:51,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:04:51,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:04:51,299 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;@1773b94e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:04:51,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:04:51,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 214 states have internal predecessors, (319), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 02:04:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:04:51,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:51,328 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] [2022-11-03 02:04:51,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 851492583, now seen corresponding path program 1 times [2022-11-03 02:04:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38532431] [2022-11-03 02:04:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:51,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:51,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:51,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38532431] [2022-11-03 02:04:51,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38532431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:51,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:51,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:04:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168409154] [2022-11-03 02:04:51,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:51,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:51,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:51,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:51,789 INFO L87 Difference]: Start difference. First operand has 266 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 214 states have internal predecessors, (319), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:04:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:52,444 INFO L93 Difference]: Finished difference Result 582 states and 877 transitions. [2022-11-03 02:04:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:04:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:04:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:52,460 INFO L225 Difference]: With dead ends: 582 [2022-11-03 02:04:52,460 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 02:04:52,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:52,468 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 449 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:52,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 662 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:04:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 02:04:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2022-11-03 02:04:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 241 states have (on average 1.4605809128630705) internal successors, (352), 246 states have internal predecessors, (352), 50 states have call successors, (50), 22 states have call predecessors, (50), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:04:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 448 transitions. [2022-11-03 02:04:52,572 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 448 transitions. Word has length 45 [2022-11-03 02:04:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:52,572 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 448 transitions. [2022-11-03 02:04:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:04:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 448 transitions. [2022-11-03 02:04:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:04:52,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:52,578 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] [2022-11-03 02:04:52,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:04:52,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1770467206, now seen corresponding path program 1 times [2022-11-03 02:04:52,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:52,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178100649] [2022-11-03 02:04:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:52,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:52,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:52,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178100649] [2022-11-03 02:04:52,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178100649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:52,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:52,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:04:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313623987] [2022-11-03 02:04:52,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:52,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:04:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:04:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:04:52,738 INFO L87 Difference]: Start difference. First operand 313 states and 448 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:04:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:53,582 INFO L93 Difference]: Finished difference Result 715 states and 951 transitions. [2022-11-03 02:04:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:53,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:04:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:53,589 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:04:53,589 INFO L226 Difference]: Without dead ends: 583 [2022-11-03 02:04:53,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:04:53,592 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 920 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:53,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1168 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:04:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-03 02:04:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 499. [2022-11-03 02:04:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 373 states have (on average 1.3726541554959786) internal successors, (512), 379 states have internal predecessors, (512), 77 states have call successors, (77), 45 states have call predecessors, (77), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2022-11-03 02:04:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 666 transitions. [2022-11-03 02:04:53,665 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 666 transitions. Word has length 45 [2022-11-03 02:04:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:53,666 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 666 transitions. [2022-11-03 02:04:53,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:04:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 666 transitions. [2022-11-03 02:04:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:04:53,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:53,672 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] [2022-11-03 02:04:53,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:04:53,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1941199304, now seen corresponding path program 1 times [2022-11-03 02:04:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:53,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645268526] [2022-11-03 02:04:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:53,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:53,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645268526] [2022-11-03 02:04:53,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645268526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:53,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:53,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:04:53,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600869808] [2022-11-03 02:04:53,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:53,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:04:53,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:04:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:53,987 INFO L87 Difference]: Start difference. First operand 499 states and 666 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-11-03 02:04:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:54,980 INFO L93 Difference]: Finished difference Result 1015 states and 1282 transitions. [2022-11-03 02:04:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:04:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 46 [2022-11-03 02:04:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:54,985 INFO L225 Difference]: With dead ends: 1015 [2022-11-03 02:04:54,986 INFO L226 Difference]: Without dead ends: 713 [2022-11-03 02:04:54,987 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 [2022-11-03 02:04:54,989 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 540 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:54,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1239 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:04:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-03 02:04:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 678. [2022-11-03 02:04:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 498 states have (on average 1.3333333333333333) internal successors, (664), 505 states have internal predecessors, (664), 104 states have call successors, (104), 68 states have call predecessors, (104), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2022-11-03 02:04:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 876 transitions. [2022-11-03 02:04:55,073 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 876 transitions. Word has length 46 [2022-11-03 02:04:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:55,074 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 876 transitions. [2022-11-03 02:04:55,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-11-03 02:04:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 876 transitions. [2022-11-03 02:04:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:04:55,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:55,081 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] [2022-11-03 02:04:55,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:04:55,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash 634879582, now seen corresponding path program 1 times [2022-11-03 02:04:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:55,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376304523] [2022-11-03 02:04:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:55,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376304523] [2022-11-03 02:04:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376304523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:55,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:55,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:04:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647630879] [2022-11-03 02:04:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:04:55,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:04:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:04:55,173 INFO L87 Difference]: Start difference. First operand 678 states and 876 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) [2022-11-03 02:04:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:55,377 INFO L93 Difference]: Finished difference Result 1242 states and 1546 transitions. [2022-11-03 02:04:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:04:55,377 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 [2022-11-03 02:04:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:55,382 INFO L225 Difference]: With dead ends: 1242 [2022-11-03 02:04:55,382 INFO L226 Difference]: Without dead ends: 810 [2022-11-03 02:04:55,384 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 [2022-11-03 02:04:55,385 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 67 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:55,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 636 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-03 02:04:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 705. [2022-11-03 02:04:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 521 states have (on average 1.3224568138195778) internal successors, (689), 528 states have internal predecessors, (689), 106 states have call successors, (106), 70 states have call predecessors, (106), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2022-11-03 02:04:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 905 transitions. [2022-11-03 02:04:55,455 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 905 transitions. Word has length 47 [2022-11-03 02:04:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:55,456 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 905 transitions. [2022-11-03 02:04:55,456 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) [2022-11-03 02:04:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 905 transitions. [2022-11-03 02:04:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:04:55,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:55,458 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] [2022-11-03 02:04:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:04:55,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1871912681, now seen corresponding path program 1 times [2022-11-03 02:04:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824814336] [2022-11-03 02:04:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:04:55,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824814336] [2022-11-03 02:04:55,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824814336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:55,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:55,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:04:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996829780] [2022-11-03 02:04:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:55,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:04:55,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:04:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:04:55,527 INFO L87 Difference]: Start difference. First operand 705 states and 905 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-11-03 02:04:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:55,716 INFO L93 Difference]: Finished difference Result 895 states and 1126 transitions. [2022-11-03 02:04:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:04:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 [2022-11-03 02:04:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:55,720 INFO L225 Difference]: With dead ends: 895 [2022-11-03 02:04:55,720 INFO L226 Difference]: Without dead ends: 622 [2022-11-03 02:04:55,721 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 [2022-11-03 02:04:55,723 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 354 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:55,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 396 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-03 02:04:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 513. [2022-11-03 02:04:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 381 states have (on average 1.330708661417323) internal successors, (507), 386 states have internal predecessors, (507), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 02:04:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2022-11-03 02:04:55,782 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2022-11-03 02:04:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:55,783 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2022-11-03 02:04:55,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-11-03 02:04:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2022-11-03 02:04:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:04:55,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:55,785 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] [2022-11-03 02:04:55,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:04:55,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash 564825942, now seen corresponding path program 1 times [2022-11-03 02:04:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:55,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229086671] [2022-11-03 02:04:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:55,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:55,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:55,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229086671] [2022-11-03 02:04:55,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229086671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:55,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:04:55,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:04:55,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269979350] [2022-11-03 02:04:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:55,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:04:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:04:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:04:55,932 INFO L87 Difference]: Start difference. First operand 513 states and 667 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) [2022-11-03 02:04:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:56,321 INFO L93 Difference]: Finished difference Result 616 states and 783 transitions. [2022-11-03 02:04:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:04:56,322 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 [2022-11-03 02:04:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:56,326 INFO L225 Difference]: With dead ends: 616 [2022-11-03 02:04:56,326 INFO L226 Difference]: Without dead ends: 613 [2022-11-03 02:04:56,327 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 [2022-11-03 02:04:56,328 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 641 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:56,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 372 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:04:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-03 02:04:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 512. [2022-11-03 02:04:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 381 states have (on average 1.3228346456692914) internal successors, (504), 385 states have internal predecessors, (504), 81 states have call successors, (81), 50 states have call predecessors, (81), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 02:04:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 663 transitions. [2022-11-03 02:04:56,409 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 663 transitions. Word has length 54 [2022-11-03 02:04:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:56,410 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 663 transitions. [2022-11-03 02:04:56,410 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) [2022-11-03 02:04:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 663 transitions. [2022-11-03 02:04:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:04:56,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:56,412 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] [2022-11-03 02:04:56,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:04:56,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:56,413 INFO L85 PathProgramCache]: Analyzing trace with hash 328284999, now seen corresponding path program 1 times [2022-11-03 02:04:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:56,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541079726] [2022-11-03 02:04:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:56,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:56,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:56,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541079726] [2022-11-03 02:04:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541079726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:56,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366481323] [2022-11-03 02:04:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:56,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:56,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:56,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:56,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:04:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:04:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:57,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:57,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366481323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:57,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753744273] [2022-11-03 02:04:57,525 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 02:04:57,526 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:57,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:57,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:57,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:05:06,038 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-03 02:05:06,077 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 201 for LOIs [2022-11-03 02:05:06,110 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-03 02:05:07,024 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-03 02:05:07,117 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-03 02:05:07,198 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-03 02:05:07,230 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-03 02:05:07,277 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:05:41,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1753744273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:41,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:41,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-03 02:05:41,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835745827] [2022-11-03 02:05:41,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:41,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:05:41,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:05:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:05:41,152 INFO L87 Difference]: Start difference. First operand 512 states and 663 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 02:06:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:24,386 INFO L93 Difference]: Finished difference Result 876 states and 1074 transitions. [2022-11-03 02:06:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:06:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-03 02:06:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:24,390 INFO L225 Difference]: With dead ends: 876 [2022-11-03 02:06:24,390 INFO L226 Difference]: Without dead ends: 561 [2022-11-03 02:06:24,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 02:06:24,394 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 198 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 6572 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 6799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 6572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:24,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 3077 Invalid, 6799 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [227 Valid, 6572 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-03 02:06:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-03 02:06:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 546. [2022-11-03 02:06:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 407 states have (on average 1.307125307125307) internal successors, (532), 411 states have internal predecessors, (532), 83 states have call successors, (83), 56 states have call predecessors, (83), 54 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-03 02:06:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 695 transitions. [2022-11-03 02:06:24,500 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 695 transitions. Word has length 55 [2022-11-03 02:06:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:24,501 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 695 transitions. [2022-11-03 02:06:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 02:06:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 695 transitions. [2022-11-03 02:06:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:06:24,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:24,503 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] [2022-11-03 02:06:24,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:24,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:24,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 397966636, now seen corresponding path program 1 times [2022-11-03 02:06:24,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:24,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079830249] [2022-11-03 02:06:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:06:24,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:24,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079830249] [2022-11-03 02:06:24,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079830249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:24,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:06:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777563356] [2022-11-03 02:06:24,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:24,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:24,779 INFO L87 Difference]: Start difference. First operand 546 states and 695 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) [2022-11-03 02:06:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:25,006 INFO L93 Difference]: Finished difference Result 827 states and 1017 transitions. [2022-11-03 02:06:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:25,007 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 [2022-11-03 02:06:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:25,010 INFO L225 Difference]: With dead ends: 827 [2022-11-03 02:06:25,011 INFO L226 Difference]: Without dead ends: 658 [2022-11-03 02:06:25,012 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 [2022-11-03 02:06:25,012 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 42 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:25,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 675 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-03 02:06:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 581. [2022-11-03 02:06:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 436 states have (on average 1.3027522935779816) internal successors, (568), 440 states have internal predecessors, (568), 86 states have call successors, (86), 59 states have call predecessors, (86), 57 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-03 02:06:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 737 transitions. [2022-11-03 02:06:25,130 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 737 transitions. Word has length 61 [2022-11-03 02:06:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:25,130 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 737 transitions. [2022-11-03 02:06:25,131 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) [2022-11-03 02:06:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 737 transitions. [2022-11-03 02:06:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:06:25,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:25,132 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:06:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:06:25,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:25,134 INFO L85 PathProgramCache]: Analyzing trace with hash -588481139, now seen corresponding path program 1 times [2022-11-03 02:06:25,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:25,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265359283] [2022-11-03 02:06:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:25,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:06:25,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265359283] [2022-11-03 02:06:25,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265359283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:25,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:25,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:06:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914347760] [2022-11-03 02:06:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:25,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:06:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:06:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:06:25,340 INFO L87 Difference]: Start difference. First operand 581 states and 737 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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) [2022-11-03 02:06:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:26,288 INFO L93 Difference]: Finished difference Result 1044 states and 1263 transitions. [2022-11-03 02:06:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:06:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 63 [2022-11-03 02:06:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:26,293 INFO L225 Difference]: With dead ends: 1044 [2022-11-03 02:06:26,293 INFO L226 Difference]: Without dead ends: 741 [2022-11-03 02:06:26,294 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 [2022-11-03 02:06:26,295 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 524 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:26,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1196 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:06:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-03 02:06:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 720. [2022-11-03 02:06:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 530 states have (on average 1.2660377358490567) internal successors, (671), 534 states have internal predecessors, (671), 110 states have call successors, (110), 80 states have call predecessors, (110), 78 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-03 02:06:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 888 transitions. [2022-11-03 02:06:26,409 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 888 transitions. Word has length 63 [2022-11-03 02:06:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:26,409 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 888 transitions. [2022-11-03 02:06:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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) [2022-11-03 02:06:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 888 transitions. [2022-11-03 02:06:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:06:26,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:26,411 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:06:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:06:26,412 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash -110956988, now seen corresponding path program 1 times [2022-11-03 02:06:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:26,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819259054] [2022-11-03 02:06:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:06:26,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819259054] [2022-11-03 02:06:26,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819259054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057648959] [2022-11-03 02:06:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:26,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:26,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:26,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:26,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:06:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:06:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:06:26,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:06:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057648959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496086171] [2022-11-03 02:06:27,151 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 02:06:27,151 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:27,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:27,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:27,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:43,789 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-03 02:06:43,817 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2022-11-03 02:06:43,846 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 324 for LOIs [2022-11-03 02:06:44,000 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-03 02:06:44,721 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-03 02:06:44,792 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-03 02:06:44,864 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-03 02:06:44,891 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-03 02:06:44,917 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:07:30,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19901#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~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) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:07:30,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:07:30,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:07:30,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 02:07:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486534954] [2022-11-03 02:07:30,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:30,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:07:30,649 INFO L87 Difference]: Start difference. First operand 720 states and 888 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 02:07:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:31,488 INFO L93 Difference]: Finished difference Result 1814 states and 2129 transitions. [2022-11-03 02:07:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-03 02:07:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:31,506 INFO L225 Difference]: With dead ends: 1814 [2022-11-03 02:07:31,507 INFO L226 Difference]: Without dead ends: 1811 [2022-11-03 02:07:31,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:07:31,510 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 855 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:31,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1351 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:07:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-11-03 02:07:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1234. [2022-11-03 02:07:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 886 states have (on average 1.2302483069977426) internal successors, (1090), 890 states have internal predecessors, (1090), 194 states have call successors, (194), 154 states have call predecessors, (194), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-03 02:07:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1475 transitions. [2022-11-03 02:07:31,760 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1475 transitions. Word has length 64 [2022-11-03 02:07:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:31,761 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1475 transitions. [2022-11-03 02:07:31,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 02:07:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1475 transitions. [2022-11-03 02:07:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:07:31,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:31,763 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:07:31,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:31,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:31,981 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash 470557781, now seen corresponding path program 2 times [2022-11-03 02:07:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:31,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406429592] [2022-11-03 02:07:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:31,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:07:32,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:32,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406429592] [2022-11-03 02:07:32,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406429592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:32,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:32,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:32,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11412199] [2022-11-03 02:07:32,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:32,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:32,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:07:32,028 INFO L87 Difference]: Start difference. First operand 1234 states and 1475 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2022-11-03 02:07:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:32,341 INFO L93 Difference]: Finished difference Result 1986 states and 2331 transitions. [2022-11-03 02:07:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:32,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 67 [2022-11-03 02:07:32,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:32,347 INFO L225 Difference]: With dead ends: 1986 [2022-11-03 02:07:32,347 INFO L226 Difference]: Without dead ends: 1230 [2022-11-03 02:07:32,349 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 [2022-11-03 02:07:32,350 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 357 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:32,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 429 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-11-03 02:07:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1219. [2022-11-03 02:07:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 871 states have (on average 1.2169919632606199) internal successors, (1060), 875 states have internal predecessors, (1060), 194 states have call successors, (194), 154 states have call predecessors, (194), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-03 02:07:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1445 transitions. [2022-11-03 02:07:32,564 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1445 transitions. Word has length 67 [2022-11-03 02:07:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:32,565 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1445 transitions. [2022-11-03 02:07:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2022-11-03 02:07:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1445 transitions. [2022-11-03 02:07:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:07:32,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:32,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:32,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:07:32,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash -340657383, now seen corresponding path program 1 times [2022-11-03 02:07:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38367134] [2022-11-03 02:07:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:32,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38367134] [2022-11-03 02:07:32,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38367134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:32,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:32,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:32,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482025609] [2022-11-03 02:07:32,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:32,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:32,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:32,732 INFO L87 Difference]: Start difference. First operand 1219 states and 1445 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2022-11-03 02:07:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:33,931 INFO L93 Difference]: Finished difference Result 2107 states and 2920 transitions. [2022-11-03 02:07:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 68 [2022-11-03 02:07:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:33,941 INFO L225 Difference]: With dead ends: 2107 [2022-11-03 02:07:33,942 INFO L226 Difference]: Without dead ends: 1921 [2022-11-03 02:07:33,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:33,945 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 1459 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:33,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1494 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:07:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-03 02:07:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1908. [2022-11-03 02:07:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1451 states have (on average 1.3425223983459682) internal successors, (1948), 1458 states have internal predecessors, (1948), 279 states have call successors, (279), 178 states have call predecessors, (279), 176 states have return successors, (338), 273 states have call predecessors, (338), 276 states have call successors, (338) [2022-11-03 02:07:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2565 transitions. [2022-11-03 02:07:34,279 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2565 transitions. Word has length 68 [2022-11-03 02:07:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:34,280 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2565 transitions. [2022-11-03 02:07:34,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2022-11-03 02:07:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2565 transitions. [2022-11-03 02:07:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:07:34,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:34,283 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] [2022-11-03 02:07:34,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:07:34,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1734690527, now seen corresponding path program 1 times [2022-11-03 02:07:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612912682] [2022-11-03 02:07:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:07:34,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612912682] [2022-11-03 02:07:34,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612912682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:34,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:34,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:34,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228792876] [2022-11-03 02:07:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:34,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:34,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:07:34,346 INFO L87 Difference]: Start difference. First operand 1908 states and 2565 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) [2022-11-03 02:07:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:34,758 INFO L93 Difference]: Finished difference Result 2874 states and 3659 transitions. [2022-11-03 02:07:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:34,759 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 [2022-11-03 02:07:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:34,769 INFO L225 Difference]: With dead ends: 2874 [2022-11-03 02:07:34,770 INFO L226 Difference]: Without dead ends: 2084 [2022-11-03 02:07:34,773 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 [2022-11-03 02:07:34,773 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 37 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:34,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 666 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-11-03 02:07:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1955. [2022-11-03 02:07:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1490 states have (on average 1.338255033557047) internal successors, (1994), 1497 states have internal predecessors, (1994), 283 states have call successors, (283), 182 states have call predecessors, (283), 180 states have return successors, (342), 277 states have call predecessors, (342), 280 states have call successors, (342) [2022-11-03 02:07:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2619 transitions. [2022-11-03 02:07:35,108 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2619 transitions. Word has length 71 [2022-11-03 02:07:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:35,109 INFO L495 AbstractCegarLoop]: Abstraction has 1955 states and 2619 transitions. [2022-11-03 02:07:35,109 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) [2022-11-03 02:07:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2619 transitions. [2022-11-03 02:07:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:07:35,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:35,111 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] [2022-11-03 02:07:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:07:35,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1818645420, now seen corresponding path program 1 times [2022-11-03 02:07:35,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088415889] [2022-11-03 02:07:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:35,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:07:35,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:35,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088415889] [2022-11-03 02:07:35,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088415889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:35,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966364330] [2022-11-03 02:07:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:35,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:35,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:35,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:07:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:35,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:07:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:07:35,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966364330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:35,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:35,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 02:07:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526627694] [2022-11-03 02:07:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:35,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:35,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:07:35,771 INFO L87 Difference]: Start difference. First operand 1955 states and 2619 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) [2022-11-03 02:07:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:36,389 INFO L93 Difference]: Finished difference Result 2817 states and 3623 transitions. [2022-11-03 02:07:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:07:36,390 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 [2022-11-03 02:07:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:36,399 INFO L225 Difference]: With dead ends: 2817 [2022-11-03 02:07:36,399 INFO L226 Difference]: Without dead ends: 1770 [2022-11-03 02:07:36,402 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 [2022-11-03 02:07:36,403 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 351 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:36,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1375 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-11-03 02:07:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1585. [2022-11-03 02:07:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1252 states have (on average 1.3761980830670926) internal successors, (1723), 1259 states have internal predecessors, (1723), 212 states have call successors, (212), 121 states have call predecessors, (212), 119 states have return successors, (271), 206 states have call predecessors, (271), 209 states have call successors, (271) [2022-11-03 02:07:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2206 transitions. [2022-11-03 02:07:36,664 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2206 transitions. Word has length 102 [2022-11-03 02:07:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:36,665 INFO L495 AbstractCegarLoop]: Abstraction has 1585 states and 2206 transitions. [2022-11-03 02:07:36,665 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) [2022-11-03 02:07:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2206 transitions. [2022-11-03 02:07:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:07:36,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:36,668 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] [2022-11-03 02:07:36,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:07:36,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash -473618755, now seen corresponding path program 1 times [2022-11-03 02:07:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716595619] [2022-11-03 02:07:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:07:37,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:37,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716595619] [2022-11-03 02:07:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716595619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138105797] [2022-11-03 02:07:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:37,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:37,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:07:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:07:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:07:37,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:37,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138105797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:37,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:37,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:07:37,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244592933] [2022-11-03 02:07:37,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:37,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:37,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:07:37,400 INFO L87 Difference]: Start difference. First operand 1585 states and 2206 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) [2022-11-03 02:07:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:37,984 INFO L93 Difference]: Finished difference Result 2134 states and 2831 transitions. [2022-11-03 02:07:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:07:37,985 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 [2022-11-03 02:07:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:37,993 INFO L225 Difference]: With dead ends: 2134 [2022-11-03 02:07:37,993 INFO L226 Difference]: Without dead ends: 1541 [2022-11-03 02:07:37,995 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 [2022-11-03 02:07:37,996 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 66 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:37,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2065 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-11-03 02:07:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1449. [2022-11-03 02:07:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1152 states have (on average 1.3940972222222223) internal successors, (1606), 1159 states have internal predecessors, (1606), 193 states have call successors, (193), 104 states have call predecessors, (193), 102 states have return successors, (252), 187 states have call predecessors, (252), 190 states have call successors, (252) [2022-11-03 02:07:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2051 transitions. [2022-11-03 02:07:38,256 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2051 transitions. Word has length 112 [2022-11-03 02:07:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:38,257 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 2051 transitions. [2022-11-03 02:07:38,257 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) [2022-11-03 02:07:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2051 transitions. [2022-11-03 02:07:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 02:07:38,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:38,262 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] [2022-11-03 02:07:38,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:38,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:07:38,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1953417118, now seen corresponding path program 1 times [2022-11-03 02:07:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666257926] [2022-11-03 02:07:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:07:38,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:38,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666257926] [2022-11-03 02:07:38,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666257926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:38,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616532420] [2022-11-03 02:07:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:38,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:38,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:07:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:07:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:07:38,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:38,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616532420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:38,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:38,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 02:07:38,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044993464] [2022-11-03 02:07:38,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:38,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:38,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:07:38,918 INFO L87 Difference]: Start difference. First operand 1449 states and 2051 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) [2022-11-03 02:07:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:39,418 INFO L93 Difference]: Finished difference Result 2198 states and 2896 transitions. [2022-11-03 02:07:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:07:39,419 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 [2022-11-03 02:07:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:39,428 INFO L225 Difference]: With dead ends: 2198 [2022-11-03 02:07:39,428 INFO L226 Difference]: Without dead ends: 1741 [2022-11-03 02:07:39,430 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 [2022-11-03 02:07:39,431 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 337 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:39,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1482 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-03 02:07:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1707. [2022-11-03 02:07:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1314 states have (on average 1.3592085235920852) internal successors, (1786), 1327 states have internal predecessors, (1786), 241 states have call successors, (241), 146 states have call predecessors, (241), 150 states have return successors, (312), 235 states have call predecessors, (312), 238 states have call successors, (312) [2022-11-03 02:07:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2339 transitions. [2022-11-03 02:07:39,742 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2339 transitions. Word has length 113 [2022-11-03 02:07:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:39,743 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 2339 transitions. [2022-11-03 02:07:39,743 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) [2022-11-03 02:07:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2339 transitions. [2022-11-03 02:07:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:07:39,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:39,746 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] [2022-11-03 02:07:39,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:07:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:07:39,959 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -499724428, now seen corresponding path program 1 times [2022-11-03 02:07:39,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:39,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255581918] [2022-11-03 02:07:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:39,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:07:40,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255581918] [2022-11-03 02:07:40,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255581918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450535567] [2022-11-03 02:07:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:40,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:40,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:40,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:07:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:07:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:07:42,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:07:43,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450535567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:43,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927639372] [2022-11-03 02:07:43,847 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:07:43,847 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:07:43,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:07:43,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:07:43,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:09:12,055 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 384 for LOIs [2022-11-03 02:09:13,061 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 336 for LOIs [2022-11-03 02:09:13,213 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 329 for LOIs [2022-11-03 02:09:13,370 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 396 for LOIs [2022-11-03 02:09:17,638 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 224 for LOIs [2022-11-03 02:09:18,238 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 173 for LOIs [2022-11-03 02:09:18,836 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 388 for LOIs [2022-11-03 02:09:19,940 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 411 for LOIs [2022-11-03 02:09:20,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:10:51,360 WARN L234 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 357 DAG size of output: 276 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:00,906 WARN L234 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 363 DAG size of output: 282 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:10,494 WARN L234 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 365 DAG size of output: 284 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:47,646 WARN L234 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 367 DAG size of output: 286 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:11:51,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60624#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= ~t12_i~0 0) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 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) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-03 02:11:51,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:11:51,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:11:51,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-03 02:11:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50567862] [2022-11-03 02:11:51,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:11:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:11:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=9948, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 02:11:51,471 INFO L87 Difference]: Start difference. First operand 1707 states and 2339 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 02:12:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:16,266 INFO L93 Difference]: Finished difference Result 3997 states and 4993 transitions. [2022-11-03 02:12:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-03 02:12:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-03 02:12:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:16,281 INFO L225 Difference]: With dead ends: 3997 [2022-11-03 02:12:16,281 INFO L226 Difference]: Without dead ends: 3282 [2022-11-03 02:12:16,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 287 SyntacticMatches, 8 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40697 ImplicationChecksByTransitivity, 169.2s TimeCoverageRelationStatistics Valid=9160, Invalid=89122, Unknown=0, NotChecked=0, Total=98282 [2022-11-03 02:12:16,300 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 5801 mSDsluCounter, 5140 mSDsCounter, 0 mSdLazyCounter, 8505 mSolverCounterSat, 2924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5803 SdHoareTripleChecker+Valid, 4705 SdHoareTripleChecker+Invalid, 11429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2924 IncrementalHoareTripleChecker+Valid, 8505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:16,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5803 Valid, 4705 Invalid, 11429 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2924 Valid, 8505 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 02:12:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-11-03 02:12:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1983. [2022-11-03 02:12:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1498 states have (on average 1.3331108144192256) internal successors, (1997), 1513 states have internal predecessors, (1997), 286 states have call successors, (286), 183 states have call predecessors, (286), 197 states have return successors, (369), 288 states have call predecessors, (369), 283 states have call successors, (369) [2022-11-03 02:12:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 2652 transitions. [2022-11-03 02:12:16,766 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 2652 transitions. Word has length 114 [2022-11-03 02:12:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:16,767 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 2652 transitions. [2022-11-03 02:12:16,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 02:12:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 2652 transitions. [2022-11-03 02:12:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:12:16,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:16,787 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] [2022-11-03 02:12:16,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:12:17,015 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -59759107, now seen corresponding path program 1 times [2022-11-03 02:12:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625859063] [2022-11-03 02:12:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:12:17,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:17,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625859063] [2022-11-03 02:12:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625859063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345037169] [2022-11-03 02:12:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:17,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:17,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:17,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:17,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:12:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:12:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:12:17,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:12:17,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345037169] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:17,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:12:17,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 02:12:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147734877] [2022-11-03 02:12:17,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:17,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:12:17,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:12:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:12:17,977 INFO L87 Difference]: Start difference. First operand 1983 states and 2652 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) [2022-11-03 02:12:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:19,344 INFO L93 Difference]: Finished difference Result 3307 states and 4200 transitions. [2022-11-03 02:12:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:12:19,345 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 [2022-11-03 02:12:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:19,356 INFO L225 Difference]: With dead ends: 3307 [2022-11-03 02:12:19,356 INFO L226 Difference]: Without dead ends: 2316 [2022-11-03 02:12:19,359 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 [2022-11-03 02:12:19,360 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 547 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:19,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 845 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:12:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-11-03 02:12:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2063. [2022-11-03 02:12:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1543 states have (on average 1.3272845106934543) internal successors, (2048), 1561 states have internal predecessors, (2048), 305 states have call successors, (305), 192 states have call predecessors, (305), 213 states have return successors, (409), 311 states have call predecessors, (409), 302 states have call successors, (409) [2022-11-03 02:12:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2762 transitions. [2022-11-03 02:12:19,780 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2762 transitions. Word has length 115 [2022-11-03 02:12:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:19,781 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 2762 transitions. [2022-11-03 02:12:19,781 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) [2022-11-03 02:12:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2762 transitions. [2022-11-03 02:12:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:12:19,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:19,785 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] [2022-11-03 02:12:19,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:20,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:12:20,011 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1941308644, now seen corresponding path program 1 times [2022-11-03 02:12:20,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:20,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565480265] [2022-11-03 02:12:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:12:20,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565480265] [2022-11-03 02:12:20,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565480265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378539215] [2022-11-03 02:12:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:20,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:20,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:20,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:12:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:12:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:12:22,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:12:23,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378539215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168176394] [2022-11-03 02:12:23,823 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:12:23,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:12:23,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:12:23,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:12:23,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:12:48,956 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 372 for LOIs [2022-11-03 02:12:49,926 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 321 for LOIs [2022-11-03 02:12:50,056 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 319 for LOIs [2022-11-03 02:12:50,204 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 384 for LOIs [2022-11-03 02:12:54,157 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 212 for LOIs [2022-11-03 02:12:54,673 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 160 for LOIs [2022-11-03 02:12:55,169 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 376 for LOIs [2022-11-03 02:12:56,402 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 399 for LOIs [2022-11-03 02:12:57,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:13:36,820 WARN L234 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 327 DAG size of output: 248 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:44,960 WARN L234 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 329 DAG size of output: 250 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:14:28,609 WARN L234 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 355 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:00,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79068#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t11_i~0) (= 0 ~t2_st~0) (<= 2 ~T12_E~0) (<= 2 ~E_5~0) (= ~t12_st~0 0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (= ~t11_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (<= ~t11_i~0 0) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-03 02:15:00,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:15:00,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:15:00,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-03 02:15:00,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240416895] [2022-11-03 02:15:00,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:15:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:15:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=10477, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:15:01,002 INFO L87 Difference]: Start difference. First operand 2063 states and 2762 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:15:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:11,748 INFO L93 Difference]: Finished difference Result 4912 states and 6104 transitions. [2022-11-03 02:15:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-03 02:15:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-03 02:15:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:11,764 INFO L225 Difference]: With dead ends: 4912 [2022-11-03 02:15:11,765 INFO L226 Difference]: Without dead ends: 3841 [2022-11-03 02:15:11,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 310 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14920 ImplicationChecksByTransitivity, 129.9s TimeCoverageRelationStatistics Valid=3633, Invalid=32277, Unknown=0, NotChecked=0, Total=35910 [2022-11-03 02:15:11,773 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 4352 mSDsluCounter, 3860 mSDsCounter, 0 mSdLazyCounter, 6728 mSolverCounterSat, 2402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4353 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 9130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2402 IncrementalHoareTripleChecker+Valid, 6728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:11,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4353 Valid, 3552 Invalid, 9130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2402 Valid, 6728 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 02:15:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2022-11-03 02:15:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 2600. [2022-11-03 02:15:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 1929 states have (on average 1.2944530844997408) internal successors, (2497), 1947 states have internal predecessors, (2497), 379 states have call successors, (379), 251 states have call predecessors, (379), 290 states have return successors, (501), 403 states have call predecessors, (501), 376 states have call successors, (501) [2022-11-03 02:15:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3377 transitions. [2022-11-03 02:15:12,286 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3377 transitions. Word has length 124 [2022-11-03 02:15:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:12,287 INFO L495 AbstractCegarLoop]: Abstraction has 2600 states and 3377 transitions. [2022-11-03 02:15:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:15:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3377 transitions. [2022-11-03 02:15:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:15:12,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:12,291 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] [2022-11-03 02:15:12,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:12,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:12,494 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:12,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1442369439, now seen corresponding path program 1 times [2022-11-03 02:15:12,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:12,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602840358] [2022-11-03 02:15:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:15:12,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602840358] [2022-11-03 02:15:12,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602840358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546324097] [2022-11-03 02:15:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:12,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:12,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:12,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:15:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:12,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:15:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:15:12,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:15:13,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546324097] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:13,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:13,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 02:15:13,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198751505] [2022-11-03 02:15:13,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:13,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:15:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:15:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:15:13,207 INFO L87 Difference]: Start difference. First operand 2600 states and 3377 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) [2022-11-03 02:15:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:14,436 INFO L93 Difference]: Finished difference Result 3559 states and 4468 transitions. [2022-11-03 02:15:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:15:14,437 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 [2022-11-03 02:15:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:14,445 INFO L225 Difference]: With dead ends: 3559 [2022-11-03 02:15:14,445 INFO L226 Difference]: Without dead ends: 1951 [2022-11-03 02:15:14,449 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 [2022-11-03 02:15:14,450 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 832 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:14,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 809 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:15:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-03 02:15:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1610. [2022-11-03 02:15:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1232 states have (on average 1.359577922077922) internal successors, (1675), 1249 states have internal predecessors, (1675), 229 states have call successors, (229), 130 states have call predecessors, (229), 147 states have return successors, (318), 232 states have call predecessors, (318), 226 states have call successors, (318) [2022-11-03 02:15:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2222 transitions. [2022-11-03 02:15:14,849 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2222 transitions. Word has length 125 [2022-11-03 02:15:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:14,849 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2222 transitions. [2022-11-03 02:15:14,849 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) [2022-11-03 02:15:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2222 transitions. [2022-11-03 02:15:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:15:14,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:14,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:15:14,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:15,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1266351552, now seen corresponding path program 1 times [2022-11-03 02:15:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110888356] [2022-11-03 02:15:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:15,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110888356] [2022-11-03 02:15:15,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110888356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263922554] [2022-11-03 02:15:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:15,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:15,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:15,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:15:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:15:15,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:15,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263922554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:15,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:15,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:15:15,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599888290] [2022-11-03 02:15:15,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:15,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:15,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:15,520 INFO L87 Difference]: Start difference. First operand 1610 states and 2222 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2022-11-03 02:15:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:16,093 INFO L93 Difference]: Finished difference Result 3344 states and 5134 transitions. [2022-11-03 02:15:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 137 [2022-11-03 02:15:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:16,104 INFO L225 Difference]: With dead ends: 3344 [2022-11-03 02:15:16,105 INFO L226 Difference]: Without dead ends: 2469 [2022-11-03 02:15:16,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:16,110 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 332 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:16,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 574 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-11-03 02:15:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2460. [2022-11-03 02:15:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1950 states have (on average 1.4205128205128206) internal successors, (2770), 1970 states have internal predecessors, (2770), 331 states have call successors, (331), 160 states have call predecessors, (331), 177 states have return successors, (478), 331 states have call predecessors, (478), 328 states have call successors, (478) [2022-11-03 02:15:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3579 transitions. [2022-11-03 02:15:16,586 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3579 transitions. Word has length 137 [2022-11-03 02:15:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:16,587 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 3579 transitions. [2022-11-03 02:15:16,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2022-11-03 02:15:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3579 transitions. [2022-11-03 02:15:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:15:16,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:16,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:15:16,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:16,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:16,819 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:16,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1867683488, now seen corresponding path program 1 times [2022-11-03 02:15:16,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:16,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396394839] [2022-11-03 02:15:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:16,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:16,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396394839] [2022-11-03 02:15:16,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396394839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:16,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77938498] [2022-11-03 02:15:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:16,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:16,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:16,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:15:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:15:17,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:17,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77938498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:17,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:17,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:15:17,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801607775] [2022-11-03 02:15:17,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:17,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:17,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:17,238 INFO L87 Difference]: Start difference. First operand 2460 states and 3579 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2022-11-03 02:15:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:17,975 INFO L93 Difference]: Finished difference Result 5879 states and 9297 transitions. [2022-11-03 02:15:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 137 [2022-11-03 02:15:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:17,995 INFO L225 Difference]: With dead ends: 5879 [2022-11-03 02:15:17,995 INFO L226 Difference]: Without dead ends: 4154 [2022-11-03 02:15:18,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:18,005 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 350 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:18,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 571 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2022-11-03 02:15:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 4140. [2022-11-03 02:15:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3371 states have (on average 1.4624740433105903) internal successors, (4930), 3397 states have internal predecessors, (4930), 530 states have call successors, (530), 220 states have call predecessors, (530), 237 states have return successors, (789), 524 states have call predecessors, (789), 527 states have call successors, (789) [2022-11-03 02:15:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6249 transitions. [2022-11-03 02:15:18,759 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6249 transitions. Word has length 137 [2022-11-03 02:15:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:18,759 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 6249 transitions. [2022-11-03 02:15:18,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2022-11-03 02:15:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6249 transitions. [2022-11-03 02:15:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:15:18,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:18,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:15:18,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:18,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:18,983 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash -176797568, now seen corresponding path program 1 times [2022-11-03 02:15:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:18,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997033205] [2022-11-03 02:15:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:18,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:19,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:19,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997033205] [2022-11-03 02:15:19,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997033205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252160317] [2022-11-03 02:15:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:19,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:19,116 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:19,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:15:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:19,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:15:19,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:19,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252160317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:19,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:19,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:15:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846134195] [2022-11-03 02:15:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:19,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:19,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:19,398 INFO L87 Difference]: Start difference. First operand 4140 states and 6249 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-11-03 02:15:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:20,510 INFO L93 Difference]: Finished difference Result 10889 states and 17482 transitions. [2022-11-03 02:15:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 137 [2022-11-03 02:15:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:20,537 INFO L225 Difference]: With dead ends: 10889 [2022-11-03 02:15:20,538 INFO L226 Difference]: Without dead ends: 7484 [2022-11-03 02:15:20,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:20,555 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 353 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:20,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 574 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-11-03 02:15:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 7460. [2022-11-03 02:15:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 6183 states have (on average 1.4863334950671194) internal successors, (9190), 6221 states have internal predecessors, (9190), 918 states have call successors, (918), 340 states have call predecessors, (918), 357 states have return successors, (1393), 900 states have call predecessors, (1393), 915 states have call successors, (1393) [2022-11-03 02:15:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 11501 transitions. [2022-11-03 02:15:21,523 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 11501 transitions. Word has length 137 [2022-11-03 02:15:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:21,524 INFO L495 AbstractCegarLoop]: Abstraction has 7460 states and 11501 transitions. [2022-11-03 02:15:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-11-03 02:15:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 11501 transitions. [2022-11-03 02:15:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:15:21,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:21,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:15:21,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 02:15:21,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:21,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1629197664, now seen corresponding path program 1 times [2022-11-03 02:15:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512536899] [2022-11-03 02:15:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:21,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:21,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:21,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512536899] [2022-11-03 02:15:21,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512536899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:21,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925867784] [2022-11-03 02:15:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:21,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:21,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:21,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:21,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:15:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:22,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:15:22,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:22,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925867784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:22,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:22,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:15:22,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445193993] [2022-11-03 02:15:22,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:22,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:22,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:22,197 INFO L87 Difference]: Start difference. First operand 7460 states and 11501 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2022-11-03 02:15:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:24,199 INFO L93 Difference]: Finished difference Result 20789 states and 33570 transitions. [2022-11-03 02:15:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 137 [2022-11-03 02:15:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:24,256 INFO L225 Difference]: With dead ends: 20789 [2022-11-03 02:15:24,256 INFO L226 Difference]: Without dead ends: 14064 [2022-11-03 02:15:24,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:24,285 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 338 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:24,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 571 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2022-11-03 02:15:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 14020. [2022-11-03 02:15:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 11747 states have (on average 1.4974035924065718) internal successors, (17590), 11809 states have internal predecessors, (17590), 1674 states have call successors, (1674), 580 states have call predecessors, (1674), 597 states have return successors, (2565), 1632 states have call predecessors, (2565), 1671 states have call successors, (2565) [2022-11-03 02:15:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 21829 transitions. [2022-11-03 02:15:26,240 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 21829 transitions. Word has length 137 [2022-11-03 02:15:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:26,241 INFO L495 AbstractCegarLoop]: Abstraction has 14020 states and 21829 transitions. [2022-11-03 02:15:26,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2022-11-03 02:15:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 21829 transitions. [2022-11-03 02:15:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:15:26,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:26,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:15:26,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 02:15:26,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1109252992, now seen corresponding path program 1 times [2022-11-03 02:15:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:26,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281504255] [2022-11-03 02:15:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:26,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281504255] [2022-11-03 02:15:26,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281504255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:26,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278541300] [2022-11-03 02:15:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:26,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:26,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:26,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:15:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:15:26,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:26,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278541300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:26,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:26,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:15:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968816502] [2022-11-03 02:15:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:26,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:26,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:26,906 INFO L87 Difference]: Start difference. First operand 14020 states and 21829 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2022-11-03 02:15:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:30,520 INFO L93 Difference]: Finished difference Result 40349 states and 65182 transitions. [2022-11-03 02:15:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 137 [2022-11-03 02:15:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:30,633 INFO L225 Difference]: With dead ends: 40349 [2022-11-03 02:15:30,634 INFO L226 Difference]: Without dead ends: 27064 [2022-11-03 02:15:30,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:30,860 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 344 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:30,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 571 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27064 states. [2022-11-03 02:15:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27064 to 26980. [2022-11-03 02:15:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26980 states, 22755 states have (on average 1.5007690617446714) internal successors, (34150), 22865 states have internal predecessors, (34150), 3146 states have call successors, (3146), 1060 states have call predecessors, (3146), 1077 states have return successors, (4837), 3056 states have call predecessors, (4837), 3143 states have call successors, (4837) [2022-11-03 02:15:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26980 states to 26980 states and 42133 transitions. [2022-11-03 02:15:34,901 INFO L78 Accepts]: Start accepts. Automaton has 26980 states and 42133 transitions. Word has length 137 [2022-11-03 02:15:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:34,901 INFO L495 AbstractCegarLoop]: Abstraction has 26980 states and 42133 transitions. [2022-11-03 02:15:34,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2022-11-03 02:15:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26980 states and 42133 transitions. [2022-11-03 02:15:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:15:34,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:34,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:15:34,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:35,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 02:15:35,153 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash 638114720, now seen corresponding path program 1 times [2022-11-03 02:15:35,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:35,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940757627] [2022-11-03 02:15:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:35,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:35,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940757627] [2022-11-03 02:15:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940757627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149833642] [2022-11-03 02:15:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:35,279 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:35,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05af0eba-1325-4550-b41d-1d8e70ec9a43/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:15:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:15:35,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:15:35,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:35,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149833642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:35,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:35,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:15:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621194035] [2022-11-03 02:15:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:35,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:35,597 INFO L87 Difference]: Start difference. First operand 26980 states and 42133 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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) [2022-11-03 02:15:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:42,612 INFO L93 Difference]: Finished difference Result 78989 states and 127278 transitions. [2022-11-03 02:15:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 137 [2022-11-03 02:15:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:42,808 INFO L225 Difference]: With dead ends: 78989 [2022-11-03 02:15:42,809 INFO L226 Difference]: Without dead ends: 52744 [2022-11-03 02:15:43,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:15:43,083 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 329 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:43,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 571 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52744 states.