./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1e5a0d04cda68be8a659e3f7c3c8d0a5df6c0732a10757201346fc85875f569 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:46:19,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:46:19,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:46:19,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:46:19,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:46:19,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:46:19,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:46:19,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:46:19,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:46:19,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:46:19,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:46:19,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:46:19,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:46:19,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:46:19,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:46:19,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:46:19,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:46:19,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:46:19,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:46:19,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:46:19,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:46:19,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:46:19,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:46:19,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:46:19,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:46:19,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:46:19,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:46:19,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:46:19,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:46:19,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:46:19,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:46:19,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:46:19,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:46:19,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:46:19,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:46:19,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:46:19,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:46:19,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:46:19,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:46:19,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:46:19,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:46:19,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:46:19,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:46:19,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:46:19,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:46:19,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:46:19,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:46:19,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:46:19,500 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:46:19,500 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:46:19,500 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:46:19,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:46:19,501 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:46:19,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:46:19,501 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:46:19,501 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:46:19,502 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:46:19,502 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:46:19,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:46:19,503 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:46:19,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:46:19,504 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:46:19,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:46:19,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:46:19,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:46:19,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:46:19,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:46:19,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:46:19,507 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:46:19,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:46:19,508 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:46:19,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:46:19,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:46:19,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:46:19,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:46:19,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:46:19,510 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:46:19,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:46:19,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:46:19,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:46:19,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:46:19,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:46:19,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:46:19,512 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_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1e5a0d04cda68be8a659e3f7c3c8d0a5df6c0732a10757201346fc85875f569 [2022-11-19 07:46:19,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:46:19,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:46:19,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:46:19,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:46:19,895 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:46:19,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c [2022-11-19 07:46:19,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/data/94a48d881/af800d2f699f4a41a870d2cba7b90496/FLAG86b54b7f5 [2022-11-19 07:46:21,042 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:46:21,043 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c [2022-11-19 07:46:21,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/data/94a48d881/af800d2f699f4a41a870d2cba7b90496/FLAG86b54b7f5 [2022-11-19 07:46:21,351 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/data/94a48d881/af800d2f699f4a41a870d2cba7b90496 [2022-11-19 07:46:21,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:46:21,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:46:21,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:46:21,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:46:21,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:46:21,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:21" (1/1) ... [2022-11-19 07:46:21,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42963c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:21, skipping insertion in model container [2022-11-19 07:46:21,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:21" (1/1) ... [2022-11-19 07:46:21,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:46:21,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:46:23,890 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c[376251,376264] [2022-11-19 07:46:23,929 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c[383339,383352] [2022-11-19 07:46:24,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:46:24,114 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:46:25,461 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c[376251,376264] [2022-11-19 07:46:25,478 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/sv-benchmarks/c/combinations/Problem05_label41+token_ring.03.cil-2.c[383339,383352] [2022-11-19 07:46:25,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:46:25,586 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:46:25,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25 WrapperNode [2022-11-19 07:46:25,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:46:25,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:46:25,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:46:25,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:46:25,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:25,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,048 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2022-11-19 07:46:26,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:46:26,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:46:26,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:46:26,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:46:26,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:46:26,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:46:26,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:46:26,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:46:26,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (1/1) ... [2022-11-19 07:46:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:46:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:26,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:46:26,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:46:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:46:26,817 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:46:26,817 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:46:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:46:26,818 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:46:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:46:26,818 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:46:26,818 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:46:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:46:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:46:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:46:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:46:26,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:46:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:46:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:46:26,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:46:26,953 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:46:26,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:46:36,130 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:46:38,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:46:38,548 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-19 07:46:38,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:38 BoogieIcfgContainer [2022-11-19 07:46:38,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:46:38,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:46:38,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:46:38,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:46:38,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:21" (1/3) ... [2022-11-19 07:46:38,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c9a834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:38, skipping insertion in model container [2022-11-19 07:46:38,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:25" (2/3) ... [2022-11-19 07:46:38,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c9a834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:38, skipping insertion in model container [2022-11-19 07:46:38,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:38" (3/3) ... [2022-11-19 07:46:38,562 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.03.cil-2.c [2022-11-19 07:46:38,581 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:46:38,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:46:38,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:46:38,699 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;@4e9a9d62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:46:38,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:46:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 07:46:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:46:38,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:38,726 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] [2022-11-19 07:46:38,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1649771839, now seen corresponding path program 1 times [2022-11-19 07:46:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:38,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060223967] [2022-11-19 07:46:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:38,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:39,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060223967] [2022-11-19 07:46:39,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060223967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:39,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:39,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:46:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113579376] [2022-11-19 07:46:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:39,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:46:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:46:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:46:39,164 INFO L87 Difference]: Start difference. First operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:46:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:40,242 INFO L93 Difference]: Finished difference Result 3536 states and 6923 transitions. [2022-11-19 07:46:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:46:40,245 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-19 07:46:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:40,270 INFO L225 Difference]: With dead ends: 3536 [2022-11-19 07:46:40,271 INFO L226 Difference]: Without dead ends: 1803 [2022-11-19 07:46:40,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:46:40,287 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3482 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 6420 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:40,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 6420 Invalid, 596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:46:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-19 07:46:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1802. [2022-11-19 07:46:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1758 states have (on average 1.9522184300341296) internal successors, (3432), 1761 states have internal predecessors, (3432), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:46:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3492 transitions. [2022-11-19 07:46:40,420 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3492 transitions. Word has length 40 [2022-11-19 07:46:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:40,421 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 3492 transitions. [2022-11-19 07:46:40,421 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:46:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3492 transitions. [2022-11-19 07:46:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:46:40,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:40,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:40,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:46:40,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1330943976, now seen corresponding path program 1 times [2022-11-19 07:46:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:40,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507985997] [2022-11-19 07:46:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:46:40,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:40,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507985997] [2022-11-19 07:46:40,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507985997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025599213] [2022-11-19 07:46:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:40,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:40,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:40,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:40,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:46:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:40,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:46:40,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:46:40,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:40,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025599213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:40,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:40,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:46:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540664219] [2022-11-19 07:46:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:40,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:40,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:40,945 INFO L87 Difference]: Start difference. First operand 1802 states and 3492 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:46:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:41,430 INFO L93 Difference]: Finished difference Result 2107 states and 3925 transitions. [2022-11-19 07:46:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-19 07:46:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:41,447 INFO L225 Difference]: With dead ends: 2107 [2022-11-19 07:46:41,448 INFO L226 Difference]: Without dead ends: 1951 [2022-11-19 07:46:41,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:41,454 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3363 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:41,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 3280 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:46:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-19 07:46:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1947. [2022-11-19 07:46:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1867 states have (on average 1.9180503481521156) internal successors, (3581), 1871 states have internal predecessors, (3581), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-19 07:46:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 3689 transitions. [2022-11-19 07:46:41,517 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 3689 transitions. Word has length 73 [2022-11-19 07:46:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:41,517 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 3689 transitions. [2022-11-19 07:46:41,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:46:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 3689 transitions. [2022-11-19 07:46:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:46:41,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:41,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:41,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:41,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:41,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1837146410, now seen corresponding path program 1 times [2022-11-19 07:46:41,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:41,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086589227] [2022-11-19 07:46:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:41,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:46:41,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086589227] [2022-11-19 07:46:41,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086589227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:41,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236628721] [2022-11-19 07:46:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:41,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:41,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:41,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:46:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:46:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:46:42,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:42,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236628721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:42,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:42,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:46:42,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540917221] [2022-11-19 07:46:42,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:42,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:42,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:42,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:42,128 INFO L87 Difference]: Start difference. First operand 1947 states and 3689 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:46:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:42,614 INFO L93 Difference]: Finished difference Result 2536 states and 4516 transitions. [2022-11-19 07:46:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-19 07:46:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:42,626 INFO L225 Difference]: With dead ends: 2536 [2022-11-19 07:46:42,626 INFO L226 Difference]: Without dead ends: 2235 [2022-11-19 07:46:42,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:42,632 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3366 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 3256 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:46:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-19 07:46:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2229. [2022-11-19 07:46:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2079 states have (on average 1.86002886002886) internal successors, (3867), 2085 states have internal predecessors, (3867), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-19 07:46:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4067 transitions. [2022-11-19 07:46:42,720 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4067 transitions. Word has length 73 [2022-11-19 07:46:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:42,720 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4067 transitions. [2022-11-19 07:46:42,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:46:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4067 transitions. [2022-11-19 07:46:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:46:42,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:42,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:42,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:42,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:42,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1811285848, now seen corresponding path program 1 times [2022-11-19 07:46:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589849615] [2022-11-19 07:46:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:42,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:46:43,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589849615] [2022-11-19 07:46:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589849615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:43,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:46:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224260869] [2022-11-19 07:46:43,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:43,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:46:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:46:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:43,304 INFO L87 Difference]: Start difference. First operand 2229 states and 4067 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:46:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:44,620 INFO L93 Difference]: Finished difference Result 3505 states and 5806 transitions. [2022-11-19 07:46:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:46:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-19 07:46:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:44,643 INFO L225 Difference]: With dead ends: 3505 [2022-11-19 07:46:44,643 INFO L226 Difference]: Without dead ends: 2923 [2022-11-19 07:46:44,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:46:44,649 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3590 mSDsluCounter, 9386 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 12559 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:44,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3602 Valid, 12559 Invalid, 1146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [87 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:46:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-11-19 07:46:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2761. [2022-11-19 07:46:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2475 states have (on average 1.7741414141414142) internal successors, (4391), 2485 states have internal predecessors, (4391), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-19 07:46:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4767 transitions. [2022-11-19 07:46:44,799 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4767 transitions. Word has length 73 [2022-11-19 07:46:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:44,800 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 4767 transitions. [2022-11-19 07:46:44,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:46:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4767 transitions. [2022-11-19 07:46:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:46:44,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:44,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:44,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:46:44,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash -196066481, now seen corresponding path program 1 times [2022-11-19 07:46:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:44,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497578510] [2022-11-19 07:46:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:44,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:46:44,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:44,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497578510] [2022-11-19 07:46:44,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497578510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:44,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:44,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:46:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417884846] [2022-11-19 07:46:44,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:44,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:44,896 INFO L87 Difference]: Start difference. First operand 2761 states and 4767 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:46:45,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:45,477 INFO L93 Difference]: Finished difference Result 3622 states and 5946 transitions. [2022-11-19 07:46:45,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:45,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-19 07:46:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:45,490 INFO L225 Difference]: With dead ends: 3622 [2022-11-19 07:46:45,491 INFO L226 Difference]: Without dead ends: 3044 [2022-11-19 07:46:45,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:45,494 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 45 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:45,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6362 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:46:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-19 07:46:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2913. [2022-11-19 07:46:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2611 states have (on average 1.7644580620451935) internal successors, (4607), 2621 states have internal predecessors, (4607), 196 states have call successors, (196), 104 states have call predecessors, (196), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-11-19 07:46:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 4999 transitions. [2022-11-19 07:46:45,644 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 4999 transitions. Word has length 74 [2022-11-19 07:46:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:45,647 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 4999 transitions. [2022-11-19 07:46:45,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:46:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 4999 transitions. [2022-11-19 07:46:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:46:45,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:45,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:45,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:46:45,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash -744473480, now seen corresponding path program 1 times [2022-11-19 07:46:45,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:45,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842253936] [2022-11-19 07:46:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:46:45,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:45,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842253936] [2022-11-19 07:46:45,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842253936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:45,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:45,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:46:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184068765] [2022-11-19 07:46:45,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:45,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:45,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:45,740 INFO L87 Difference]: Start difference. First operand 2913 states and 4999 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:46:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:46,269 INFO L93 Difference]: Finished difference Result 4810 states and 7608 transitions. [2022-11-19 07:46:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-11-19 07:46:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:46,285 INFO L225 Difference]: With dead ends: 4810 [2022-11-19 07:46:46,285 INFO L226 Difference]: Without dead ends: 3543 [2022-11-19 07:46:46,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:46,291 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3359 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:46,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3280 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:46:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-11-19 07:46:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3529. [2022-11-19 07:46:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3083 states have (on average 1.6980214077197535) internal successors, (5235), 3097 states have internal predecessors, (5235), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-19 07:46:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 5811 transitions. [2022-11-19 07:46:46,462 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 5811 transitions. Word has length 96 [2022-11-19 07:46:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:46,462 INFO L495 AbstractCegarLoop]: Abstraction has 3529 states and 5811 transitions. [2022-11-19 07:46:46,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:46:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 5811 transitions. [2022-11-19 07:46:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:46:46,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:46,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:46:46,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2090117330, now seen corresponding path program 1 times [2022-11-19 07:46:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:46,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808242008] [2022-11-19 07:46:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 07:46:46,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808242008] [2022-11-19 07:46:46,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808242008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677474335] [2022-11-19 07:46:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:46,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:46,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:46:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:46:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:46:46,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:46,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677474335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:46,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:46,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:46:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242610651] [2022-11-19 07:46:46,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:46,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:46,762 INFO L87 Difference]: Start difference. First operand 3529 states and 5811 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:46:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:47,639 INFO L93 Difference]: Finished difference Result 5197 states and 8113 transitions. [2022-11-19 07:46:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-19 07:46:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:47,659 INFO L225 Difference]: With dead ends: 5197 [2022-11-19 07:46:47,659 INFO L226 Difference]: Without dead ends: 3931 [2022-11-19 07:46:47,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:47,664 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 53 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:47,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6364 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:46:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-19 07:46:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3741. [2022-11-19 07:46:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3271 states have (on average 1.6921430755120759) internal successors, (5535), 3285 states have internal predecessors, (5535), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-19 07:46:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 6135 transitions. [2022-11-19 07:46:47,856 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 6135 transitions. Word has length 109 [2022-11-19 07:46:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:47,857 INFO L495 AbstractCegarLoop]: Abstraction has 3741 states and 6135 transitions. [2022-11-19 07:46:47,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:46:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 6135 transitions. [2022-11-19 07:46:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:46:47,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:47,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:47,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:48,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:46:48,071 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1625285954, now seen corresponding path program 2 times [2022-11-19 07:46:48,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:48,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638892193] [2022-11-19 07:46:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:48,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:46:48,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:48,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638892193] [2022-11-19 07:46:48,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638892193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:48,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842394238] [2022-11-19 07:46:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:46:48,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:48,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:48,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:48,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:46:48,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:46:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:46:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:46:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:46:48,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:48,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842394238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:48,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:46:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829521784] [2022-11-19 07:46:48,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:48,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:48,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:48,573 INFO L87 Difference]: Start difference. First operand 3741 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:46:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:49,231 INFO L93 Difference]: Finished difference Result 5229 states and 8277 transitions. [2022-11-19 07:46:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:49,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-19 07:46:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:49,272 INFO L225 Difference]: With dead ends: 5229 [2022-11-19 07:46:49,272 INFO L226 Difference]: Without dead ends: 3751 [2022-11-19 07:46:49,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:49,278 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 102 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:49,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6364 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:46:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-11-19 07:46:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3733. [2022-11-19 07:46:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3263 states have (on average 1.681581366840331) internal successors, (5487), 3277 states have internal predecessors, (5487), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-19 07:46:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 6087 transitions. [2022-11-19 07:46:49,456 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 6087 transitions. Word has length 109 [2022-11-19 07:46:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:49,458 INFO L495 AbstractCegarLoop]: Abstraction has 3733 states and 6087 transitions. [2022-11-19 07:46:49,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:46:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 6087 transitions. [2022-11-19 07:46:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:46:49,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:49,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:49,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:49,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:49,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1659674108, now seen corresponding path program 1 times [2022-11-19 07:46:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:49,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501340785] [2022-11-19 07:46:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:46:49,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501340785] [2022-11-19 07:46:49,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501340785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486294168] [2022-11-19 07:46:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:49,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:49,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:46:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:46:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:46:50,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:50,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486294168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:50,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:50,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:46:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323001549] [2022-11-19 07:46:50,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:50,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:50,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:50,123 INFO L87 Difference]: Start difference. First operand 3733 states and 6087 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:46:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:50,788 INFO L93 Difference]: Finished difference Result 5579 states and 8550 transitions. [2022-11-19 07:46:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-19 07:46:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:50,803 INFO L225 Difference]: With dead ends: 5579 [2022-11-19 07:46:50,803 INFO L226 Difference]: Without dead ends: 4181 [2022-11-19 07:46:50,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:50,811 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3369 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:50,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3369 Valid, 3191 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:46:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-11-19 07:46:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4181. [2022-11-19 07:46:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 3647 states have (on average 1.6262681656155744) internal successors, (5931), 3661 states have internal predecessors, (5931), 320 states have call successors, (320), 212 states have call predecessors, (320), 212 states have return successors, (320), 308 states have call predecessors, (320), 320 states have call successors, (320) [2022-11-19 07:46:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6571 transitions. [2022-11-19 07:46:51,116 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6571 transitions. Word has length 109 [2022-11-19 07:46:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:51,117 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 6571 transitions. [2022-11-19 07:46:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:46:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6571 transitions. [2022-11-19 07:46:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:46:51,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:51,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:51,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:51,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:51,335 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 506972551, now seen corresponding path program 1 times [2022-11-19 07:46:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063621081] [2022-11-19 07:46:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:46:51,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063621081] [2022-11-19 07:46:51,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063621081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364244646] [2022-11-19 07:46:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:51,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:51,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:51,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:46:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:46:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:46:51,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:51,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364244646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:51,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:51,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:46:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786751160] [2022-11-19 07:46:51,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:51,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:51,817 INFO L87 Difference]: Start difference. First operand 4181 states and 6571 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:46:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:52,698 INFO L93 Difference]: Finished difference Result 7683 states and 11232 transitions. [2022-11-19 07:46:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-19 07:46:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:52,718 INFO L225 Difference]: With dead ends: 7683 [2022-11-19 07:46:52,718 INFO L226 Difference]: Without dead ends: 5149 [2022-11-19 07:46:52,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:52,727 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 49 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:52,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6326 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:46:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2022-11-19 07:46:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 4477. [2022-11-19 07:46:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 3907 states have (on average 1.6204248784233428) internal successors, (6331), 3922 states have internal predecessors, (6331), 338 states have call successors, (338), 230 states have call predecessors, (338), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2022-11-19 07:46:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 7007 transitions. [2022-11-19 07:46:53,064 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 7007 transitions. Word has length 110 [2022-11-19 07:46:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:53,064 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 7007 transitions. [2022-11-19 07:46:53,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:46:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 7007 transitions. [2022-11-19 07:46:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:46:53,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:53,075 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:53,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:53,281 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1320139521, now seen corresponding path program 1 times [2022-11-19 07:46:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:53,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724062225] [2022-11-19 07:46:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:46:53,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724062225] [2022-11-19 07:46:53,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724062225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768549569] [2022-11-19 07:46:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:53,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:53,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:46:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:46:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:46:53,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:53,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768549569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:53,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:53,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:46:53,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533341559] [2022-11-19 07:46:53,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:53,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:53,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:53,617 INFO L87 Difference]: Start difference. First operand 4477 states and 7007 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:46:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:54,526 INFO L93 Difference]: Finished difference Result 6987 states and 10395 transitions. [2022-11-19 07:46:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-19 07:46:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:54,546 INFO L225 Difference]: With dead ends: 6987 [2022-11-19 07:46:54,546 INFO L226 Difference]: Without dead ends: 5529 [2022-11-19 07:46:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:54,551 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 63 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:54,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 6380 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:46:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2022-11-19 07:46:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 4957. [2022-11-19 07:46:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4323 states have (on average 1.6069858894286375) internal successors, (6947), 4338 states have internal predecessors, (6947), 370 states have call successors, (370), 262 states have call predecessors, (370), 262 states have return successors, (370), 357 states have call predecessors, (370), 370 states have call successors, (370) [2022-11-19 07:46:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 7687 transitions. [2022-11-19 07:46:54,838 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 7687 transitions. Word has length 111 [2022-11-19 07:46:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:54,839 INFO L495 AbstractCegarLoop]: Abstraction has 4957 states and 7687 transitions. [2022-11-19 07:46:54,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:46:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 7687 transitions. [2022-11-19 07:46:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:46:54,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:54,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:54,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:55,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:46:55,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:55,054 INFO L85 PathProgramCache]: Analyzing trace with hash 811874411, now seen corresponding path program 1 times [2022-11-19 07:46:55,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:55,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088382052] [2022-11-19 07:46:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:55,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:46:55,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088382052] [2022-11-19 07:46:55,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088382052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:55,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228779060] [2022-11-19 07:46:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:55,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:55,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:55,172 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:55,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:46:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:55,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:46:55,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:46:55,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:55,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228779060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:55,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:55,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:46:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756641591] [2022-11-19 07:46:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:55,347 INFO L87 Difference]: Start difference. First operand 4957 states and 7687 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:46:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:56,094 INFO L93 Difference]: Finished difference Result 7815 states and 11567 transitions. [2022-11-19 07:46:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-19 07:46:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:56,113 INFO L225 Difference]: With dead ends: 7815 [2022-11-19 07:46:56,113 INFO L226 Difference]: Without dead ends: 6109 [2022-11-19 07:46:56,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:56,119 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 57 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6375 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:56,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6375 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:46:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2022-11-19 07:46:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5621. [2022-11-19 07:46:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 4891 states have (on average 1.5863831527295031) internal successors, (7759), 4906 states have internal predecessors, (7759), 418 states have call successors, (418), 310 states have call predecessors, (418), 310 states have return successors, (418), 405 states have call predecessors, (418), 418 states have call successors, (418) [2022-11-19 07:46:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 8595 transitions. [2022-11-19 07:46:56,437 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 8595 transitions. Word has length 111 [2022-11-19 07:46:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:56,437 INFO L495 AbstractCegarLoop]: Abstraction has 5621 states and 8595 transitions. [2022-11-19 07:46:56,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:46:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 8595 transitions. [2022-11-19 07:46:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:46:56,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:56,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:56,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:46:56,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 760382056, now seen corresponding path program 1 times [2022-11-19 07:46:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844086823] [2022-11-19 07:46:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:46:56,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844086823] [2022-11-19 07:46:56,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844086823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396955709] [2022-11-19 07:46:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:56,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:56,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:56,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:46:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:46:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:46:57,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:57,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396955709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:57,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:57,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 07:46:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710351284] [2022-11-19 07:46:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:46:57,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:46:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:57,180 INFO L87 Difference]: Start difference. First operand 5621 states and 8595 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:46:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:58,489 INFO L93 Difference]: Finished difference Result 11073 states and 15837 transitions. [2022-11-19 07:46:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:46:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-19 07:46:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:58,519 INFO L225 Difference]: With dead ends: 11073 [2022-11-19 07:46:58,519 INFO L226 Difference]: Without dead ends: 7099 [2022-11-19 07:46:58,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:46:58,529 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3560 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3572 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3572 Valid, 9436 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:46:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-19 07:46:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7097. [2022-11-19 07:46:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 6065 states have (on average 1.523330585325639) internal successors, (9239), 6086 states have internal predecessors, (9239), 592 states have call successors, (592), 438 states have call predecessors, (592), 438 states have return successors, (592), 573 states have call predecessors, (592), 592 states have call successors, (592) [2022-11-19 07:46:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 10423 transitions. [2022-11-19 07:46:58,956 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 10423 transitions. Word has length 111 [2022-11-19 07:46:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:58,957 INFO L495 AbstractCegarLoop]: Abstraction has 7097 states and 10423 transitions. [2022-11-19 07:46:58,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:46:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 10423 transitions. [2022-11-19 07:46:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:46:58,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:58,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:58,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:59,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:59,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1223963725, now seen corresponding path program 1 times [2022-11-19 07:46:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42714770] [2022-11-19 07:46:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:46:59,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:59,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42714770] [2022-11-19 07:46:59,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42714770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:59,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995034311] [2022-11-19 07:46:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:59,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:59,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:46:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:46:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:46:59,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:46:59,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995034311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:59,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:46:59,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 07:46:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816974426] [2022-11-19 07:46:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:46:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:46:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:59,657 INFO L87 Difference]: Start difference. First operand 7097 states and 10423 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:47:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:01,300 INFO L93 Difference]: Finished difference Result 14609 states and 20208 transitions. [2022-11-19 07:47:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:47:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-19 07:47:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:01,331 INFO L225 Difference]: With dead ends: 14609 [2022-11-19 07:47:01,331 INFO L226 Difference]: Without dead ends: 9159 [2022-11-19 07:47:01,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:47:01,344 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 6897 mSDsluCounter, 6224 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6909 SdHoareTripleChecker+Valid, 9382 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:01,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6909 Valid, 9382 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:47:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2022-11-19 07:47:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 9157. [2022-11-19 07:47:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 7695 states have (on average 1.462508122157245) internal successors, (11254), 7725 states have internal predecessors, (11254), 840 states have call successors, (840), 620 states have call predecessors, (840), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-11-19 07:47:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 12934 transitions. [2022-11-19 07:47:02,233 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 12934 transitions. Word has length 112 [2022-11-19 07:47:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:02,233 INFO L495 AbstractCegarLoop]: Abstraction has 9157 states and 12934 transitions. [2022-11-19 07:47:02,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:47:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 12934 transitions. [2022-11-19 07:47:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:47:02,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:02,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:02,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:02,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:47:02,459 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash 505049096, now seen corresponding path program 1 times [2022-11-19 07:47:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269759400] [2022-11-19 07:47:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:02,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:47:02,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269759400] [2022-11-19 07:47:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269759400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946201128] [2022-11-19 07:47:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:02,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:02,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:47:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:02,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:47:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:47:02,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:02,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946201128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:02,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 07:47:02,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758444693] [2022-11-19 07:47:02,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:02,896 INFO L87 Difference]: Start difference. First operand 9157 states and 12934 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:47:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:04,594 INFO L93 Difference]: Finished difference Result 12316 states and 17008 transitions. [2022-11-19 07:47:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:04,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-19 07:47:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:04,620 INFO L225 Difference]: With dead ends: 12316 [2022-11-19 07:47:04,620 INFO L226 Difference]: Without dead ends: 9627 [2022-11-19 07:47:04,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:04,629 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3373 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3373 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:04,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3373 Valid, 6522 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2022-11-19 07:47:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 9399. [2022-11-19 07:47:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 7890 states have (on average 1.4574144486692016) internal successors, (11499), 7938 states have internal predecessors, (11499), 847 states have call successors, (847), 624 states have call predecessors, (847), 660 states have return successors, (883), 837 states have call predecessors, (883), 847 states have call successors, (883) [2022-11-19 07:47:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 13229 transitions. [2022-11-19 07:47:05,234 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 13229 transitions. Word has length 116 [2022-11-19 07:47:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:05,234 INFO L495 AbstractCegarLoop]: Abstraction has 9399 states and 13229 transitions. [2022-11-19 07:47:05,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:47:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 13229 transitions. [2022-11-19 07:47:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:47:05,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:05,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:05,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:05,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:47:05,454 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash -443319347, now seen corresponding path program 1 times [2022-11-19 07:47:05,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:05,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38048833] [2022-11-19 07:47:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:47:05,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38048833] [2022-11-19 07:47:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38048833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898653768] [2022-11-19 07:47:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:05,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:05,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:05,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:47:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:47:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:47:05,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:05,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898653768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:05,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:05,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:47:05,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249823898] [2022-11-19 07:47:05,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:05,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:05,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:05,713 INFO L87 Difference]: Start difference. First operand 9399 states and 13229 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:47:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:06,793 INFO L93 Difference]: Finished difference Result 12154 states and 16848 transitions. [2022-11-19 07:47:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:06,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 07:47:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:06,818 INFO L225 Difference]: With dead ends: 12154 [2022-11-19 07:47:06,818 INFO L226 Difference]: Without dead ends: 9141 [2022-11-19 07:47:06,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:06,825 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 22 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6321 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:06,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6321 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:47:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9141 states. [2022-11-19 07:47:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9141 to 8730. [2022-11-19 07:47:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 7329 states have (on average 1.4719607040523945) internal successors, (10788), 7350 states have internal predecessors, (10788), 811 states have call successors, (811), 588 states have call predecessors, (811), 588 states have return successors, (811), 792 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 07:47:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 12410 transitions. [2022-11-19 07:47:07,430 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 12410 transitions. Word has length 117 [2022-11-19 07:47:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 8730 states and 12410 transitions. [2022-11-19 07:47:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:47:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 12410 transitions. [2022-11-19 07:47:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:47:07,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:07,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:07,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:47:07,654 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash 405467550, now seen corresponding path program 1 times [2022-11-19 07:47:07,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:07,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21926758] [2022-11-19 07:47:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:47:07,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:07,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21926758] [2022-11-19 07:47:07,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21926758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:07,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555710565] [2022-11-19 07:47:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:07,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:07,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:07,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:47:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:47:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:47:08,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:08,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555710565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:08,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:08,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:47:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127526670] [2022-11-19 07:47:08,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:08,026 INFO L87 Difference]: Start difference. First operand 8730 states and 12410 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:47:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:09,038 INFO L93 Difference]: Finished difference Result 14729 states and 20254 transitions. [2022-11-19 07:47:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:09,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 07:47:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:09,066 INFO L225 Difference]: With dead ends: 14729 [2022-11-19 07:47:09,067 INFO L226 Difference]: Without dead ends: 9757 [2022-11-19 07:47:09,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:09,079 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3344 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:09,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3344 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:47:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-11-19 07:47:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 9665. [2022-11-19 07:47:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9665 states, 8189 states have (on average 1.4359506655269263) internal successors, (11759), 8210 states have internal predecessors, (11759), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-19 07:47:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9665 states to 9665 states and 13457 transitions. [2022-11-19 07:47:09,751 INFO L78 Accepts]: Start accepts. Automaton has 9665 states and 13457 transitions. Word has length 117 [2022-11-19 07:47:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:09,751 INFO L495 AbstractCegarLoop]: Abstraction has 9665 states and 13457 transitions. [2022-11-19 07:47:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:47:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 9665 states and 13457 transitions. [2022-11-19 07:47:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:47:09,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:09,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:09,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:09,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:09,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1034039874, now seen corresponding path program 1 times [2022-11-19 07:47:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795721035] [2022-11-19 07:47:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:47:10,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:10,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795721035] [2022-11-19 07:47:10,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795721035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:10,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132321592] [2022-11-19 07:47:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:10,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:10,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:10,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:47:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:47:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:47:10,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:10,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132321592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:10,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:10,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:47:10,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484156875] [2022-11-19 07:47:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:10,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:10,281 INFO L87 Difference]: Start difference. First operand 9665 states and 13457 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:47:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:11,412 INFO L93 Difference]: Finished difference Result 15251 states and 20837 transitions. [2022-11-19 07:47:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-19 07:47:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:11,439 INFO L225 Difference]: With dead ends: 15251 [2022-11-19 07:47:11,440 INFO L226 Difference]: Without dead ends: 9649 [2022-11-19 07:47:11,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:11,451 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 86 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:11,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6380 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:47:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9649 states. [2022-11-19 07:47:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9649 to 9537. [2022-11-19 07:47:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 8061 states have (on average 1.4150849770499938) internal successors, (11407), 8082 states have internal predecessors, (11407), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-19 07:47:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 13105 transitions. [2022-11-19 07:47:12,182 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 13105 transitions. Word has length 117 [2022-11-19 07:47:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:12,182 INFO L495 AbstractCegarLoop]: Abstraction has 9537 states and 13105 transitions. [2022-11-19 07:47:12,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:47:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 13105 transitions. [2022-11-19 07:47:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:47:12,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:12,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:12,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:47:12,401 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1051509089, now seen corresponding path program 1 times [2022-11-19 07:47:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:12,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280351068] [2022-11-19 07:47:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:47:12,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280351068] [2022-11-19 07:47:12,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280351068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:12,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:12,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 07:47:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72977569] [2022-11-19 07:47:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:12,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:47:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:47:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:47:12,867 INFO L87 Difference]: Start difference. First operand 9537 states and 13105 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 07:47:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:15,902 INFO L93 Difference]: Finished difference Result 21997 states and 29098 transitions. [2022-11-19 07:47:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:47:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-19 07:47:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:15,948 INFO L225 Difference]: With dead ends: 21997 [2022-11-19 07:47:15,949 INFO L226 Difference]: Without dead ends: 18009 [2022-11-19 07:47:15,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:47:15,965 INFO L413 NwaCegarLoop]: 3124 mSDtfsCounter, 10560 mSDsluCounter, 12533 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10575 SdHoareTripleChecker+Valid, 15657 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:15,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10575 Valid, 15657 Invalid, 2041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [309 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:47:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2022-11-19 07:47:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 15807. [2022-11-19 07:47:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15807 states, 13287 states have (on average 1.342891548129751) internal successors, (17843), 13320 states have internal predecessors, (17843), 1367 states have call successors, (1367), 1151 states have call predecessors, (1367), 1151 states have return successors, (1464), 1336 states have call predecessors, (1464), 1367 states have call successors, (1464) [2022-11-19 07:47:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15807 states to 15807 states and 20674 transitions. [2022-11-19 07:47:17,243 INFO L78 Accepts]: Start accepts. Automaton has 15807 states and 20674 transitions. Word has length 114 [2022-11-19 07:47:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:17,244 INFO L495 AbstractCegarLoop]: Abstraction has 15807 states and 20674 transitions. [2022-11-19 07:47:17,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 07:47:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15807 states and 20674 transitions. [2022-11-19 07:47:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:47:17,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:17,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:17,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:47:17,257 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1427169731, now seen corresponding path program 1 times [2022-11-19 07:47:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550476552] [2022-11-19 07:47:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:17,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:47:17,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550476552] [2022-11-19 07:47:17,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550476552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:17,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:17,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:47:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742051248] [2022-11-19 07:47:17,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:17,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:17,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:17,459 INFO L87 Difference]: Start difference. First operand 15807 states and 20674 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:47:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:19,702 INFO L93 Difference]: Finished difference Result 24037 states and 30733 transitions. [2022-11-19 07:47:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:47:19,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-19 07:47:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:19,746 INFO L225 Difference]: With dead ends: 24037 [2022-11-19 07:47:19,746 INFO L226 Difference]: Without dead ends: 16805 [2022-11-19 07:47:19,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:19,762 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 94 mSDsluCounter, 9420 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:19,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 12631 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:47:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2022-11-19 07:47:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 16129. [2022-11-19 07:47:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16129 states, 13391 states have (on average 1.324994399223359) internal successors, (17743), 13457 states have internal predecessors, (17743), 1494 states have call successors, (1494), 1236 states have call predecessors, (1494), 1242 states have return successors, (1656), 1436 states have call predecessors, (1656), 1494 states have call successors, (1656) [2022-11-19 07:47:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16129 states to 16129 states and 20893 transitions. [2022-11-19 07:47:21,391 INFO L78 Accepts]: Start accepts. Automaton has 16129 states and 20893 transitions. Word has length 115 [2022-11-19 07:47:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:21,392 INFO L495 AbstractCegarLoop]: Abstraction has 16129 states and 20893 transitions. [2022-11-19 07:47:21,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:47:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 16129 states and 20893 transitions. [2022-11-19 07:47:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:47:21,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:21,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:47:21,404 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash -898845155, now seen corresponding path program 1 times [2022-11-19 07:47:21,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988369407] [2022-11-19 07:47:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:47:21,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988369407] [2022-11-19 07:47:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988369407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122008245] [2022-11-19 07:47:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:21,600 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:47:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:47:21,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:21,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:21,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122008245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:21,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:21,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:47:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270226246] [2022-11-19 07:47:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:21,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:47:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:47:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:21,831 INFO L87 Difference]: Start difference. First operand 16129 states and 20893 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:47:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:24,624 INFO L93 Difference]: Finished difference Result 31038 states and 39132 transitions. [2022-11-19 07:47:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:47:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-19 07:47:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:24,669 INFO L225 Difference]: With dead ends: 31038 [2022-11-19 07:47:24,669 INFO L226 Difference]: Without dead ends: 21336 [2022-11-19 07:47:24,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:47:24,683 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 197 mSDsluCounter, 12486 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 15702 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:24,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 15702 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:47:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2022-11-19 07:47:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 20074. [2022-11-19 07:47:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 16515 states have (on average 1.2927641537995762) internal successors, (21350), 16578 states have internal predecessors, (21350), 1966 states have call successors, (1966), 1603 states have call predecessors, (1966), 1591 states have return successors, (2260), 1893 states have call predecessors, (2260), 1966 states have call successors, (2260) [2022-11-19 07:47:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 25576 transitions. [2022-11-19 07:47:26,643 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 25576 transitions. Word has length 116 [2022-11-19 07:47:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:26,643 INFO L495 AbstractCegarLoop]: Abstraction has 20074 states and 25576 transitions. [2022-11-19 07:47:26,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:47:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 25576 transitions. [2022-11-19 07:47:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:47:26,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:26,662 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:26,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:26,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:26,868 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1379447331, now seen corresponding path program 1 times [2022-11-19 07:47:26,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:26,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948273786] [2022-11-19 07:47:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:47:27,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:27,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948273786] [2022-11-19 07:47:27,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948273786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:27,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869650457] [2022-11-19 07:47:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:27,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:27,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:27,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:47:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:47:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:47:27,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869650457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:27,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:27,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:47:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876728489] [2022-11-19 07:47:27,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:27,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:27,307 INFO L87 Difference]: Start difference. First operand 20074 states and 25576 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:47:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:30,259 INFO L93 Difference]: Finished difference Result 35206 states and 44397 transitions. [2022-11-19 07:47:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-19 07:47:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:30,314 INFO L225 Difference]: With dead ends: 35206 [2022-11-19 07:47:30,314 INFO L226 Difference]: Without dead ends: 22349 [2022-11-19 07:47:30,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:30,336 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3345 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3345 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:30,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3345 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22349 states. [2022-11-19 07:47:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22349 to 21575. [2022-11-19 07:47:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21575 states, 17881 states have (on average 1.2700072702868968) internal successors, (22709), 18019 states have internal predecessors, (22709), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-19 07:47:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21575 states to 21575 states and 27058 transitions. [2022-11-19 07:47:32,634 INFO L78 Accepts]: Start accepts. Automaton has 21575 states and 27058 transitions. Word has length 141 [2022-11-19 07:47:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:32,635 INFO L495 AbstractCegarLoop]: Abstraction has 21575 states and 27058 transitions. [2022-11-19 07:47:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:47:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21575 states and 27058 transitions. [2022-11-19 07:47:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:47:32,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:32,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:32,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 07:47:32,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:32,858 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1457889734, now seen corresponding path program 1 times [2022-11-19 07:47:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296732769] [2022-11-19 07:47:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:47:32,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:32,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296732769] [2022-11-19 07:47:32,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296732769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:32,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542362108] [2022-11-19 07:47:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:32,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:32,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:32,925 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:32,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:47:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:33,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:47:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:47:33,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:33,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542362108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:33,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:33,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:47:33,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974754435] [2022-11-19 07:47:33,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:33,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:33,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:33,141 INFO L87 Difference]: Start difference. First operand 21575 states and 27058 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:47:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:35,730 INFO L93 Difference]: Finished difference Result 35655 states and 44777 transitions. [2022-11-19 07:47:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 141 [2022-11-19 07:47:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:35,788 INFO L225 Difference]: With dead ends: 35655 [2022-11-19 07:47:35,789 INFO L226 Difference]: Without dead ends: 21526 [2022-11-19 07:47:35,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:35,816 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 85 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6371 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:35,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6371 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:47:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21526 states. [2022-11-19 07:47:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21526 to 21359. [2022-11-19 07:47:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 17665 states have (on average 1.2407585621285027) internal successors, (21918), 17803 states have internal predecessors, (21918), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-19 07:47:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 26267 transitions. [2022-11-19 07:47:37,775 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 26267 transitions. Word has length 141 [2022-11-19 07:47:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:37,775 INFO L495 AbstractCegarLoop]: Abstraction has 21359 states and 26267 transitions. [2022-11-19 07:47:37,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:47:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 26267 transitions. [2022-11-19 07:47:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 07:47:37,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:37,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:37,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:37,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:47:37,997 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash -278725757, now seen corresponding path program 1 times [2022-11-19 07:47:37,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:37,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61798443] [2022-11-19 07:47:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:47:38,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61798443] [2022-11-19 07:47:38,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61798443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46532860] [2022-11-19 07:47:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:38,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:38,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:38,200 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:38,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:47:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:38,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:47:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:47:38,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:38,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46532860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:38,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:38,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:47:38,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498139668] [2022-11-19 07:47:38,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:38,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:47:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:47:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:38,470 INFO L87 Difference]: Start difference. First operand 21359 states and 26267 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:47:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:42,214 INFO L93 Difference]: Finished difference Result 41136 states and 49552 transitions. [2022-11-19 07:47:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:47:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-19 07:47:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:42,261 INFO L225 Difference]: With dead ends: 41136 [2022-11-19 07:47:42,261 INFO L226 Difference]: Without dead ends: 27280 [2022-11-19 07:47:42,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:47:42,279 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 210 mSDsluCounter, 9350 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 12563 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:42,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 12563 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:47:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27280 states. [2022-11-19 07:47:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27280 to 25890. [2022-11-19 07:47:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25890 states, 21282 states have (on average 1.2168499201202894) internal successors, (25897), 21467 states have internal predecessors, (25897), 2460 states have call successors, (2460), 2046 states have call predecessors, (2460), 2146 states have return successors, (3151), 2377 states have call predecessors, (3151), 2460 states have call successors, (3151) [2022-11-19 07:47:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25890 states to 25890 states and 31508 transitions. [2022-11-19 07:47:45,160 INFO L78 Accepts]: Start accepts. Automaton has 25890 states and 31508 transitions. Word has length 144 [2022-11-19 07:47:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:45,161 INFO L495 AbstractCegarLoop]: Abstraction has 25890 states and 31508 transitions. [2022-11-19 07:47:45,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:47:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25890 states and 31508 transitions. [2022-11-19 07:47:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:47:45,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:45,184 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:45,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:47:45,391 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 966534351, now seen corresponding path program 1 times [2022-11-19 07:47:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134740355] [2022-11-19 07:47:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:47:46,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:46,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134740355] [2022-11-19 07:47:46,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134740355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:46,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491110195] [2022-11-19 07:47:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:46,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:46,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:47:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:47:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:47:46,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-19 07:47:46,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491110195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:46,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466885136] [2022-11-19 07:47:46,855 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-19 07:47:46,856 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:46,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:46,865 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:46,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:59,420 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 113 for LOIs [2022-11-19 07:47:59,463 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 113 for LOIs [2022-11-19 07:47:59,507 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 113 for LOIs [2022-11-19 07:47:59,531 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 07:47:59,543 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 112 for LOIs [2022-11-19 07:47:59,837 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 07:48:00,562 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:24,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '733534#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:24,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:24,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:24,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-19 07:48:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572717658] [2022-11-19 07:48:24,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:48:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:48:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=5031, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:48:24,994 INFO L87 Difference]: Start difference. First operand 25890 states and 31508 transitions. Second operand has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-19 07:48:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:31,178 INFO L93 Difference]: Finished difference Result 44661 states and 54267 transitions. [2022-11-19 07:48:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-19 07:48:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 159 [2022-11-19 07:48:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:31,209 INFO L225 Difference]: With dead ends: 44661 [2022-11-19 07:48:31,209 INFO L226 Difference]: Without dead ends: 20378 [2022-11-19 07:48:31,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 432 SyntacticMatches, 23 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9155 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1274, Invalid=17358, Unknown=0, NotChecked=0, Total=18632 [2022-11-19 07:48:31,240 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 7875 mSDsluCounter, 29885 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7886 SdHoareTripleChecker+Valid, 33188 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:31,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7886 Valid, 33188 Invalid, 4800 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [366 Valid, 4434 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 07:48:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20378 states. [2022-11-19 07:48:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20378 to 15381. [2022-11-19 07:48:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15381 states, 12867 states have (on average 1.2640087044377089) internal successors, (16264), 12948 states have internal predecessors, (16264), 1300 states have call successors, (1300), 1164 states have call predecessors, (1300), 1212 states have return successors, (1621), 1268 states have call predecessors, (1621), 1300 states have call successors, (1621) [2022-11-19 07:48:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15381 states to 15381 states and 19185 transitions. [2022-11-19 07:48:32,650 INFO L78 Accepts]: Start accepts. Automaton has 15381 states and 19185 transitions. Word has length 159 [2022-11-19 07:48:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:32,650 INFO L495 AbstractCegarLoop]: Abstraction has 15381 states and 19185 transitions. [2022-11-19 07:48:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-19 07:48:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15381 states and 19185 transitions. [2022-11-19 07:48:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-19 07:48:32,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:32,660 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-11-19 07:48:32,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:32,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:48:32,867 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:32,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1963892509, now seen corresponding path program 1 times [2022-11-19 07:48:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:32,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792134597] [2022-11-19 07:48:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 07:48:33,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792134597] [2022-11-19 07:48:33,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792134597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070249834] [2022-11-19 07:48:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:33,138 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:33,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:48:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:48:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:48:33,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-19 07:48:33,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070249834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [649976652] [2022-11-19 07:48:33,862 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-19 07:48:33,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:48:33,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:48:33,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:48:33,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:48:43,948 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 112 for LOIs [2022-11-19 07:48:43,982 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 112 for LOIs [2022-11-19 07:48:44,009 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 136 for LOIs [2022-11-19 07:48:44,030 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 07:48:44,038 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-19 07:48:44,125 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 07:48:44,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:49:07,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '816230#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:49:07,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:49:07,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:49:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2022-11-19 07:49:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294195391] [2022-11-19 07:49:07,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:07,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:49:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:49:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:49:07,281 INFO L87 Difference]: Start difference. First operand 15381 states and 19185 transitions. Second operand has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-19 07:49:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:12,817 INFO L93 Difference]: Finished difference Result 27232 states and 33287 transitions. [2022-11-19 07:49:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-19 07:49:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) Word has length 162 [2022-11-19 07:49:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:12,849 INFO L225 Difference]: With dead ends: 27232 [2022-11-19 07:49:12,849 INFO L226 Difference]: Without dead ends: 13811 [2022-11-19 07:49:12,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 435 SyntacticMatches, 32 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12515 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=1632, Invalid=23808, Unknown=0, NotChecked=0, Total=25440 [2022-11-19 07:49:12,880 INFO L413 NwaCegarLoop]: 3420 mSDtfsCounter, 11013 mSDsluCounter, 30960 mSDsCounter, 0 mSdLazyCounter, 4235 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11020 SdHoareTripleChecker+Valid, 34380 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 4235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:12,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11020 Valid, 34380 Invalid, 4497 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [262 Valid, 4235 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:49:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13811 states. [2022-11-19 07:49:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13811 to 11284. [2022-11-19 07:49:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 9538 states have (on average 1.29555462361082) internal successors, (12357), 9588 states have internal predecessors, (12357), 887 states have call successors, (887), 819 states have call predecessors, (887), 857 states have return successors, (1141), 876 states have call predecessors, (1141), 887 states have call successors, (1141) [2022-11-19 07:49:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 14385 transitions. [2022-11-19 07:49:13,961 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 14385 transitions. Word has length 162 [2022-11-19 07:49:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:13,961 INFO L495 AbstractCegarLoop]: Abstraction has 11284 states and 14385 transitions. [2022-11-19 07:49:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-19 07:49:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 14385 transitions. [2022-11-19 07:49:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-19 07:49:13,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:13,968 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:13,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:14,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:49:14,168 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash 552280789, now seen corresponding path program 1 times [2022-11-19 07:49:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:14,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386980542] [2022-11-19 07:49:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 07:49:14,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:14,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386980542] [2022-11-19 07:49:14,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386980542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:14,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642757342] [2022-11-19 07:49:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:14,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:14,895 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:14,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:49:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:49:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:49:15,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:49:15,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642757342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:15,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:49:15,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-19 07:49:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531769242] [2022-11-19 07:49:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:49:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:49:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:49:15,159 INFO L87 Difference]: Start difference. First operand 11284 states and 14385 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-19 07:49:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:16,582 INFO L93 Difference]: Finished difference Result 19662 states and 23957 transitions. [2022-11-19 07:49:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:49:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 164 [2022-11-19 07:49:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:16,599 INFO L225 Difference]: With dead ends: 19662 [2022-11-19 07:49:16,599 INFO L226 Difference]: Without dead ends: 10594 [2022-11-19 07:49:16,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:49:16,610 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 3353 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3353 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:16,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3353 Valid, 6531 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:49:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2022-11-19 07:49:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10286. [2022-11-19 07:49:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 8723 states have (on average 1.2956551645076235) internal successors, (11302), 8802 states have internal predecessors, (11302), 782 states have call successors, (782), 714 states have call predecessors, (782), 779 states have return successors, (1028), 769 states have call predecessors, (1028), 782 states have call successors, (1028) [2022-11-19 07:49:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 13112 transitions. [2022-11-19 07:49:17,441 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 13112 transitions. Word has length 164 [2022-11-19 07:49:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:17,442 INFO L495 AbstractCegarLoop]: Abstraction has 10286 states and 13112 transitions. [2022-11-19 07:49:17,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-19 07:49:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 13112 transitions. [2022-11-19 07:49:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 07:49:17,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:17,448 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:17,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:17,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:49:17,648 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1166212620, now seen corresponding path program 1 times [2022-11-19 07:49:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067849464] [2022-11-19 07:49:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:17,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 07:49:18,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067849464] [2022-11-19 07:49:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067849464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032977223] [2022-11-19 07:49:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:18,502 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:18,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:49:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:49:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:49:19,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-19 07:49:19,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032977223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:19,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1490203348] [2022-11-19 07:49:19,802 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-11-19 07:49:19,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:19,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:19,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:19,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:31,926 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 111 for LOIs [2022-11-19 07:49:31,955 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2022-11-19 07:49:31,993 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2022-11-19 07:49:32,018 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 07:49:32,030 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-19 07:49:32,119 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 07:49:32,932 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:50:02,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '908852#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:50:02,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:50:02,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:50:02,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 32 [2022-11-19 07:50:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669050551] [2022-11-19 07:50:02,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:50:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:50:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=7743, Unknown=0, NotChecked=0, Total=8372 [2022-11-19 07:50:02,426 INFO L87 Difference]: Start difference. First operand 10286 states and 13112 transitions. Second operand has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 07:50:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:11,670 INFO L93 Difference]: Finished difference Result 26778 states and 32368 transitions. [2022-11-19 07:50:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-19 07:50:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 165 [2022-11-19 07:50:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:11,707 INFO L225 Difference]: With dead ends: 26778 [2022-11-19 07:50:11,707 INFO L226 Difference]: Without dead ends: 19628 [2022-11-19 07:50:11,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 431 SyntacticMatches, 8 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9396 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=2312, Invalid=20338, Unknown=0, NotChecked=0, Total=22650 [2022-11-19 07:50:11,718 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 29361 mSDsluCounter, 25703 mSDsCounter, 0 mSdLazyCounter, 5276 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29363 SdHoareTripleChecker+Valid, 28841 SdHoareTripleChecker+Invalid, 6819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 5276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29363 Valid, 28841 Invalid, 6819 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1543 Valid, 5276 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-19 07:50:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19628 states. [2022-11-19 07:50:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19628 to 13365. [2022-11-19 07:50:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13365 states, 11159 states have (on average 1.257549959673806) internal successors, (14033), 11226 states have internal predecessors, (14033), 1144 states have call successors, (1144), 1028 states have call predecessors, (1144), 1060 states have return successors, (1394), 1110 states have call predecessors, (1394), 1144 states have call successors, (1394) [2022-11-19 07:50:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13365 states to 13365 states and 16571 transitions. [2022-11-19 07:50:14,002 INFO L78 Accepts]: Start accepts. Automaton has 13365 states and 16571 transitions. Word has length 165 [2022-11-19 07:50:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:14,003 INFO L495 AbstractCegarLoop]: Abstraction has 13365 states and 16571 transitions. [2022-11-19 07:50:14,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 07:50:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 13365 states and 16571 transitions. [2022-11-19 07:50:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:50:14,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:14,010 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:14,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:50:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:50:14,216 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1132253067, now seen corresponding path program 1 times [2022-11-19 07:50:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257217269] [2022-11-19 07:50:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-19 07:50:14,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257217269] [2022-11-19 07:50:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257217269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:14,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:14,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:50:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504033625] [2022-11-19 07:50:14,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:14,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:50:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:50:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:50:14,420 INFO L87 Difference]: Start difference. First operand 13365 states and 16571 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:50:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:21,638 INFO L93 Difference]: Finished difference Result 40727 states and 47893 transitions. [2022-11-19 07:50:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:50:21,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 173 [2022-11-19 07:50:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:21,705 INFO L225 Difference]: With dead ends: 40727 [2022-11-19 07:50:21,706 INFO L226 Difference]: Without dead ends: 36739 [2022-11-19 07:50:21,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:50:21,718 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 3633 mSDsluCounter, 9927 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3633 SdHoareTripleChecker+Valid, 13330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:21,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3633 Valid, 13330 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:50:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36739 states. [2022-11-19 07:50:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36739 to 26994. [2022-11-19 07:50:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26994 states, 22107 states have (on average 1.1941014158411363) internal successors, (26398), 22227 states have internal predecessors, (26398), 2576 states have call successors, (2576), 2260 states have call predecessors, (2576), 2309 states have return successors, (3182), 2506 states have call predecessors, (3182), 2576 states have call successors, (3182) [2022-11-19 07:50:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26994 states to 26994 states and 32156 transitions. [2022-11-19 07:50:25,920 INFO L78 Accepts]: Start accepts. Automaton has 26994 states and 32156 transitions. Word has length 173 [2022-11-19 07:50:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:25,921 INFO L495 AbstractCegarLoop]: Abstraction has 26994 states and 32156 transitions. [2022-11-19 07:50:25,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:50:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 26994 states and 32156 transitions. [2022-11-19 07:50:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-19 07:50:25,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:25,934 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:25,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-19 07:50:25,934 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash -408122826, now seen corresponding path program 1 times [2022-11-19 07:50:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:25,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558356678] [2022-11-19 07:50:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:25,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 75 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-19 07:50:26,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558356678] [2022-11-19 07:50:26,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558356678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:50:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697966618] [2022-11-19 07:50:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:26,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:50:26,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:50:26,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:50:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:50:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:50:27,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-19 07:50:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697966618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:27,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033124285] [2022-11-19 07:50:27,663 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-11-19 07:50:27,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:27,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:27,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:27,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:37,286 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 111 for LOIs [2022-11-19 07:50:37,312 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2022-11-19 07:50:37,341 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2022-11-19 07:50:37,356 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 07:50:37,364 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-19 07:50:37,448 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 07:50:38,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:51:01,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055064#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:51:01,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:51:01,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:51:01,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 12] total 31 [2022-11-19 07:51:01,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201707984] [2022-11-19 07:51:01,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:01,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:51:01,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:51:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=8118, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 07:51:01,753 INFO L87 Difference]: Start difference. First operand 26994 states and 32156 transitions. Second operand has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 07:51:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:08,420 INFO L93 Difference]: Finished difference Result 35487 states and 41823 transitions. [2022-11-19 07:51:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 07:51:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 191 [2022-11-19 07:51:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:08,444 INFO L225 Difference]: With dead ends: 35487 [2022-11-19 07:51:08,444 INFO L226 Difference]: Without dead ends: 11099 [2022-11-19 07:51:08,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 508 SyntacticMatches, 9 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9605 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=2187, Invalid=20163, Unknown=0, NotChecked=0, Total=22350 [2022-11-19 07:51:08,474 INFO L413 NwaCegarLoop]: 3129 mSDtfsCounter, 32672 mSDsluCounter, 28101 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32674 SdHoareTripleChecker+Valid, 31230 SdHoareTripleChecker+Invalid, 5864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:08,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32674 Valid, 31230 Invalid, 5864 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1262 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 07:51:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2022-11-19 07:51:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 8666. [2022-11-19 07:51:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 7363 states have (on average 1.3118294173570555) internal successors, (9659), 7389 states have internal predecessors, (9659), 688 states have call successors, (688), 621 states have call predecessors, (688), 613 states have return successors, (702), 655 states have call predecessors, (702), 688 states have call successors, (702) [2022-11-19 07:51:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 11049 transitions. [2022-11-19 07:51:09,530 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 11049 transitions. Word has length 191 [2022-11-19 07:51:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:09,530 INFO L495 AbstractCegarLoop]: Abstraction has 8666 states and 11049 transitions. [2022-11-19 07:51:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 07:51:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 11049 transitions. [2022-11-19 07:51:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 07:51:09,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:09,535 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:09,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:09,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:09,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash -984012049, now seen corresponding path program 1 times [2022-11-19 07:51:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:09,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835618861] [2022-11-19 07:51:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-19 07:51:09,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835618861] [2022-11-19 07:51:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835618861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568986951] [2022-11-19 07:51:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:09,932 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:09,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:51:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:51:10,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-19 07:51:10,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:51:10,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568986951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:10,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:51:10,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 07:51:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376948290] [2022-11-19 07:51:10,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:51:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:51:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:51:10,183 INFO L87 Difference]: Start difference. First operand 8666 states and 11049 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:51:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:11,924 INFO L93 Difference]: Finished difference Result 15650 states and 18720 transitions. [2022-11-19 07:51:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:51:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 210 [2022-11-19 07:51:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:11,940 INFO L225 Difference]: With dead ends: 15650 [2022-11-19 07:51:11,940 INFO L226 Difference]: Without dead ends: 9364 [2022-11-19 07:51:11,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:51:11,948 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3354 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 6570 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:11,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3354 Valid, 6570 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:51:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2022-11-19 07:51:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 9092. [2022-11-19 07:51:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9092 states, 7688 states have (on average 1.2870707596253903) internal successors, (9895), 7721 states have internal predecessors, (9895), 747 states have call successors, (747), 663 states have call predecessors, (747), 655 states have return successors, (761), 707 states have call predecessors, (761), 747 states have call successors, (761) [2022-11-19 07:51:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9092 states to 9092 states and 11403 transitions. [2022-11-19 07:51:13,128 INFO L78 Accepts]: Start accepts. Automaton has 9092 states and 11403 transitions. Word has length 210 [2022-11-19 07:51:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:13,129 INFO L495 AbstractCegarLoop]: Abstraction has 9092 states and 11403 transitions. [2022-11-19 07:51:13,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:51:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 9092 states and 11403 transitions. [2022-11-19 07:51:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 07:51:13,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:13,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:13,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:13,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:13,335 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1620114467, now seen corresponding path program 2 times [2022-11-19 07:51:13,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:13,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417741167] [2022-11-19 07:51:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 53 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-19 07:51:13,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:13,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417741167] [2022-11-19 07:51:13,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417741167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:13,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119394179] [2022-11-19 07:51:13,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:51:13,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:13,518 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:13,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:51:13,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:51:13,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:13,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:51:13,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-19 07:51:13,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:51:13,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119394179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:13,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:51:13,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 07:51:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523452135] [2022-11-19 07:51:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:13,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:51:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:51:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:51:13,708 INFO L87 Difference]: Start difference. First operand 9092 states and 11403 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 07:51:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:15,237 INFO L93 Difference]: Finished difference Result 13080 states and 15708 transitions. [2022-11-19 07:51:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:51:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 210 [2022-11-19 07:51:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:15,249 INFO L225 Difference]: With dead ends: 13080 [2022-11-19 07:51:15,249 INFO L226 Difference]: Without dead ends: 7569 [2022-11-19 07:51:15,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:51:15,256 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 3366 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:15,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 6516 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:51:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7569 states. [2022-11-19 07:51:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7569 to 7150. [2022-11-19 07:51:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 6137 states have (on average 1.334854163271957) internal successors, (8192), 6162 states have internal predecessors, (8192), 535 states have call successors, (535), 479 states have call predecessors, (535), 476 states have return successors, (543), 508 states have call predecessors, (543), 535 states have call successors, (543) [2022-11-19 07:51:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 9270 transitions. [2022-11-19 07:51:16,197 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 9270 transitions. Word has length 210 [2022-11-19 07:51:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:16,197 INFO L495 AbstractCegarLoop]: Abstraction has 7150 states and 9270 transitions. [2022-11-19 07:51:16,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 07:51:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 9270 transitions. [2022-11-19 07:51:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-19 07:51:16,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:16,202 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:16,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:16,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 07:51:16,402 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1578781860, now seen corresponding path program 1 times [2022-11-19 07:51:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:16,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985705905] [2022-11-19 07:51:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:16,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 156 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 07:51:16,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985705905] [2022-11-19 07:51:16,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985705905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157320590] [2022-11-19 07:51:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:16,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:16,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:16,763 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:16,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:51:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:16,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:51:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 07:51:17,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:51:17,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157320590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:17,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:51:17,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-19 07:51:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004150048] [2022-11-19 07:51:17,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:51:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:51:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:51:17,048 INFO L87 Difference]: Start difference. First operand 7150 states and 9270 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:51:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:18,123 INFO L93 Difference]: Finished difference Result 8158 states and 10365 transitions. [2022-11-19 07:51:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:51:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 211 [2022-11-19 07:51:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:18,129 INFO L225 Difference]: With dead ends: 8158 [2022-11-19 07:51:18,129 INFO L226 Difference]: Without dead ends: 2895 [2022-11-19 07:51:18,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:51:18,134 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 87 mSDsluCounter, 6256 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 9442 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:18,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 9442 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:51:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-19 07:51:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2841. [2022-11-19 07:51:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2611 states have (on average 1.6595174262734584) internal successors, (4333), 2616 states have internal predecessors, (4333), 124 states have call successors, (124), 105 states have call predecessors, (124), 104 states have return successors, (127), 119 states have call predecessors, (127), 124 states have call successors, (127) [2022-11-19 07:51:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4584 transitions. [2022-11-19 07:51:18,346 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4584 transitions. Word has length 211 [2022-11-19 07:51:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:18,347 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 4584 transitions. [2022-11-19 07:51:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:51:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4584 transitions. [2022-11-19 07:51:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-19 07:51:18,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:18,349 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:51:18,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:18,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:18,550 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1623689801, now seen corresponding path program 1 times [2022-11-19 07:51:18,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:18,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243752411] [2022-11-19 07:51:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:18,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 44 proven. 91 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-11-19 07:51:18,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:18,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243752411] [2022-11-19 07:51:18,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243752411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:18,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750963966] [2022-11-19 07:51:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:18,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:18,922 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:18,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:51:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:51:19,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 467 proven. 105 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-19 07:51:19,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-11-19 07:51:19,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750963966] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:51:19,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:51:19,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 6] total 17 [2022-11-19 07:51:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925208655] [2022-11-19 07:51:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:19,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:51:19,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:51:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:51:19,730 INFO L87 Difference]: Start difference. First operand 2841 states and 4584 transitions. Second operand has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 07:51:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:20,602 INFO L93 Difference]: Finished difference Result 3087 states and 4848 transitions. [2022-11-19 07:51:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:51:20,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 311 [2022-11-19 07:51:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:20,605 INFO L225 Difference]: With dead ends: 3087 [2022-11-19 07:51:20,605 INFO L226 Difference]: Without dead ends: 1642 [2022-11-19 07:51:20,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:51:20,607 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 10060 mSDsluCounter, 3118 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10061 SdHoareTripleChecker+Valid, 6270 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:20,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10061 Valid, 6270 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:51:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-11-19 07:51:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-11-19 07:51:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2022-11-19 07:51:20,624 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 311 [2022-11-19 07:51:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:20,625 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2022-11-19 07:51:20,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 07:51:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2022-11-19 07:51:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2022-11-19 07:51:20,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:20,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:20,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:20,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e108ed8-1aa0-48f1-bf2b-9aa56dfe807b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:20,853 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash -32914182, now seen corresponding path program 1 times [2022-11-19 07:51:20,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:20,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743898203] [2022-11-19 07:51:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:20,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:22,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:22,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743898203] [2022-11-19 07:51:22,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743898203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:22,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:22,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:51:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576571653] [2022-11-19 07:51:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:22,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:22,585 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:29,772 INFO L93 Difference]: Finished difference Result 4920 states and 9799 transitions. [2022-11-19 07:51:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:51:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1632 [2022-11-19 07:51:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:29,779 INFO L225 Difference]: With dead ends: 4920 [2022-11-19 07:51:29,779 INFO L226 Difference]: Without dead ends: 3280 [2022-11-19 07:51:29,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:29,782 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4908 mSolverCounterSat, 2225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 7133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2225 IncrementalHoareTripleChecker+Valid, 4908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:29,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 623 Invalid, 7133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2225 Valid, 4908 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 07:51:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-11-19 07:51:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2022-11-19 07:51:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 1.7834705702958218) internal successors, (5848), 3279 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 5848 transitions. [2022-11-19 07:51:29,824 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 5848 transitions. Word has length 1632 [2022-11-19 07:51:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:29,825 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 5848 transitions. [2022-11-19 07:51:29,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 5848 transitions. [2022-11-19 07:51:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1641 [2022-11-19 07:51:29,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:29,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-19 07:51:29,850 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 431138732, now seen corresponding path program 1 times [2022-11-19 07:51:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:29,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848974410] [2022-11-19 07:51:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:30,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848974410] [2022-11-19 07:51:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848974410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:30,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:30,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:51:30,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085315689] [2022-11-19 07:51:30,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:30,953 INFO L87 Difference]: Start difference. First operand 3280 states and 5848 transitions. Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:37,990 INFO L93 Difference]: Finished difference Result 9834 states and 17539 transitions. [2022-11-19 07:51:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:51:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1640 [2022-11-19 07:51:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:37,998 INFO L225 Difference]: With dead ends: 9834 [2022-11-19 07:51:37,998 INFO L226 Difference]: Without dead ends: 6556 [2022-11-19 07:51:38,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:38,003 INFO L413 NwaCegarLoop]: 1122 mSDtfsCounter, 1680 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 1313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:38,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 1133 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1313 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:51:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-19 07:51:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2022-11-19 07:51:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6555 states have (on average 1.5356216628527841) internal successors, (10066), 6555 states have internal predecessors, (10066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10066 transitions. [2022-11-19 07:51:38,072 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10066 transitions. Word has length 1640 [2022-11-19 07:51:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:38,072 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 10066 transitions. [2022-11-19 07:51:38,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10066 transitions. [2022-11-19 07:51:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1648 [2022-11-19 07:51:38,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:38,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:38,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-19 07:51:38,098 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1183723476, now seen corresponding path program 1 times [2022-11-19 07:51:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:38,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987388058] [2022-11-19 07:51:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:39,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:39,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987388058] [2022-11-19 07:51:39,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987388058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:39,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:39,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:51:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982555069] [2022-11-19 07:51:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:39,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:39,087 INFO L87 Difference]: Start difference. First operand 6556 states and 10066 transitions. Second operand has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:46,589 INFO L93 Difference]: Finished difference Result 19662 states and 30193 transitions. [2022-11-19 07:51:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:51:46,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1647 [2022-11-19 07:51:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:46,611 INFO L225 Difference]: With dead ends: 19662 [2022-11-19 07:51:46,611 INFO L226 Difference]: Without dead ends: 13108 [2022-11-19 07:51:46,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:46,616 INFO L413 NwaCegarLoop]: 2943 mSDtfsCounter, 1679 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:46,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1679 Valid, 2955 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 07:51:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2022-11-19 07:51:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 13108. [2022-11-19 07:51:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 1.3360799572747386) internal successors, (17512), 13107 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 17512 transitions. [2022-11-19 07:51:46,753 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 17512 transitions. Word has length 1647 [2022-11-19 07:51:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:46,753 INFO L495 AbstractCegarLoop]: Abstraction has 13108 states and 17512 transitions. [2022-11-19 07:51:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:46,754 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 17512 transitions. [2022-11-19 07:51:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1659 [2022-11-19 07:51:46,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:46,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:46,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-19 07:51:46,785 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash 993032222, now seen corresponding path program 1 times [2022-11-19 07:51:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140020887] [2022-11-19 07:51:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:47,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140020887] [2022-11-19 07:51:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140020887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:47,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:47,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:51:47,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331143098] [2022-11-19 07:51:47,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:47,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:47,769 INFO L87 Difference]: Start difference. First operand 13108 states and 17512 transitions. Second operand has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:55,040 INFO L93 Difference]: Finished difference Result 39318 states and 52531 transitions. [2022-11-19 07:51:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:51:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1658 [2022-11-19 07:51:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:55,072 INFO L225 Difference]: With dead ends: 39318 [2022-11-19 07:51:55,072 INFO L226 Difference]: Without dead ends: 26212 [2022-11-19 07:51:55,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:55,082 INFO L413 NwaCegarLoop]: 2497 mSDtfsCounter, 1768 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6067 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 6908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 6067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:55,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1768 Valid, 2509 Invalid, 6908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 6067 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:51:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26212 states. [2022-11-19 07:51:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26212 to 26212. [2022-11-19 07:51:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26212 states, 26211 states have (on average 1.263515317996261) internal successors, (33118), 26211 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26212 states to 26212 states and 33118 transitions. [2022-11-19 07:51:55,366 INFO L78 Accepts]: Start accepts. Automaton has 26212 states and 33118 transitions. Word has length 1658 [2022-11-19 07:51:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:55,366 INFO L495 AbstractCegarLoop]: Abstraction has 26212 states and 33118 transitions. [2022-11-19 07:51:55,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26212 states and 33118 transitions. [2022-11-19 07:51:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2022-11-19 07:51:55,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:55,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:55,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-19 07:51:55,412 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 397945697, now seen corresponding path program 1 times [2022-11-19 07:51:55,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179794479] [2022-11-19 07:51:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:55,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:56,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179794479] [2022-11-19 07:51:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179794479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:56,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:56,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:51:56,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150702212] [2022-11-19 07:51:56,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:56,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:56,447 INFO L87 Difference]: Start difference. First operand 26212 states and 33118 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:03,828 INFO L93 Difference]: Finished difference Result 65526 states and 83743 transitions. [2022-11-19 07:52:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1669 [2022-11-19 07:52:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:03,878 INFO L225 Difference]: With dead ends: 65526 [2022-11-19 07:52:03,878 INFO L226 Difference]: Without dead ends: 39316 [2022-11-19 07:52:03,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:03,894 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 2197 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4345 mSolverCounterSat, 2286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 6631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2286 IncrementalHoareTripleChecker+Valid, 4345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:03,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2197 Valid, 826 Invalid, 6631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2286 Valid, 4345 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:52:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39316 states. [2022-11-19 07:52:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39316 to 39316. [2022-11-19 07:52:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39316 states, 39315 states have (on average 1.2277502225613635) internal successors, (48269), 39315 states have internal predecessors, (48269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39316 states to 39316 states and 48269 transitions. [2022-11-19 07:52:04,258 INFO L78 Accepts]: Start accepts. Automaton has 39316 states and 48269 transitions. Word has length 1669 [2022-11-19 07:52:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:04,259 INFO L495 AbstractCegarLoop]: Abstraction has 39316 states and 48269 transitions. [2022-11-19 07:52:04,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 39316 states and 48269 transitions. [2022-11-19 07:52:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1672 [2022-11-19 07:52:04,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:04,303 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:04,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-19 07:52:04,303 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:04,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1404934401, now seen corresponding path program 1 times [2022-11-19 07:52:04,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:04,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290640713] [2022-11-19 07:52:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:52:05,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290640713] [2022-11-19 07:52:05,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290640713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:05,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:05,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60340684] [2022-11-19 07:52:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:05,361 INFO L87 Difference]: Start difference. First operand 39316 states and 48269 transitions. Second operand has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:12,894 INFO L93 Difference]: Finished difference Result 98286 states and 122686 transitions. [2022-11-19 07:52:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1671 [2022-11-19 07:52:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:12,961 INFO L225 Difference]: With dead ends: 98286 [2022-11-19 07:52:12,961 INFO L226 Difference]: Without dead ends: 58972 [2022-11-19 07:52:12,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:12,985 INFO L413 NwaCegarLoop]: 2592 mSDtfsCounter, 1943 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 2134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1943 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 6689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2134 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:12,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1943 Valid, 2604 Invalid, 6689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2134 Valid, 4555 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:52:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58972 states. [2022-11-19 07:52:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58972 to 58972. [2022-11-19 07:52:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58972 states, 58971 states have (on average 1.1900934357565582) internal successors, (70181), 58971 states have internal predecessors, (70181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58972 states to 58972 states and 70181 transitions. [2022-11-19 07:52:13,711 INFO L78 Accepts]: Start accepts. Automaton has 58972 states and 70181 transitions. Word has length 1671 [2022-11-19 07:52:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:13,712 INFO L495 AbstractCegarLoop]: Abstraction has 58972 states and 70181 transitions. [2022-11-19 07:52:13,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 58972 states and 70181 transitions. [2022-11-19 07:52:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1705 [2022-11-19 07:52:13,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:13,774 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-19 07:52:13,774 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1484904559, now seen corresponding path program 1 times [2022-11-19 07:52:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:13,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934404111] [2022-11-19 07:52:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:52:16,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934404111] [2022-11-19 07:52:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934404111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:16,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:16,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611208460] [2022-11-19 07:52:16,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:16,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:16,018 INFO L87 Difference]: Start difference. First operand 58972 states and 70181 transitions. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:22,694 INFO L93 Difference]: Finished difference Result 127770 states and 151016 transitions. [2022-11-19 07:52:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1704 [2022-11-19 07:52:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:22,774 INFO L225 Difference]: With dead ends: 127770 [2022-11-19 07:52:22,774 INFO L226 Difference]: Without dead ends: 68800 [2022-11-19 07:52:22,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:22,806 INFO L413 NwaCegarLoop]: 2948 mSDtfsCounter, 1618 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4608 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 5506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 4608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:22,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 2960 Invalid, 5506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 4608 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 07:52:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68800 states. [2022-11-19 07:52:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68800 to 68800. [2022-11-19 07:52:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68800 states, 68799 states have (on average 1.1711362083751218) internal successors, (80573), 68799 states have internal predecessors, (80573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68800 states to 68800 states and 80573 transitions. [2022-11-19 07:52:23,899 INFO L78 Accepts]: Start accepts. Automaton has 68800 states and 80573 transitions. Word has length 1704 [2022-11-19 07:52:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:23,899 INFO L495 AbstractCegarLoop]: Abstraction has 68800 states and 80573 transitions. [2022-11-19 07:52:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 68800 states and 80573 transitions. [2022-11-19 07:52:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1706 [2022-11-19 07:52:23,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:23,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:23,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-19 07:52:23,972 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1245203786, now seen corresponding path program 1 times [2022-11-19 07:52:23,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:23,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266394340] [2022-11-19 07:52:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:23,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:52:25,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:25,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266394340] [2022-11-19 07:52:25,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266394340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:25,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:25,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:52:25,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493663290] [2022-11-19 07:52:25,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:25,493 INFO L87 Difference]: Start difference. First operand 68800 states and 80573 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:33,812 INFO L93 Difference]: Finished difference Result 171996 states and 204850 transitions. [2022-11-19 07:52:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:33,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1705 [2022-11-19 07:52:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:33,934 INFO L225 Difference]: With dead ends: 171996 [2022-11-19 07:52:33,934 INFO L226 Difference]: Without dead ends: 103198 [2022-11-19 07:52:33,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:33,958 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 1797 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 2375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 7175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2375 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:33,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 643 Invalid, 7175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2375 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-19 07:52:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103198 states. [2022-11-19 07:52:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103198 to 103198. [2022-11-19 07:52:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103198 states, 103197 states have (on average 1.1742686318400728) internal successors, (121181), 103197 states have internal predecessors, (121181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103198 states to 103198 states and 121181 transitions. [2022-11-19 07:52:35,241 INFO L78 Accepts]: Start accepts. Automaton has 103198 states and 121181 transitions. Word has length 1705 [2022-11-19 07:52:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:35,241 INFO L495 AbstractCegarLoop]: Abstraction has 103198 states and 121181 transitions. [2022-11-19 07:52:35,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 103198 states and 121181 transitions. [2022-11-19 07:52:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2022-11-19 07:52:35,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:35,332 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-19 07:52:35,332 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash 14445351, now seen corresponding path program 1 times [2022-11-19 07:52:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626123553] [2022-11-19 07:52:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-19 07:52:36,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:36,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626123553] [2022-11-19 07:52:36,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626123553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:36,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:36,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:52:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361019925] [2022-11-19 07:52:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:36,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:36,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:36,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:36,873 INFO L87 Difference]: Start difference. First operand 103198 states and 121181 transitions. Second operand has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:45,926 INFO L93 Difference]: Finished difference Result 299760 states and 351412 transitions. [2022-11-19 07:52:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1739 [2022-11-19 07:52:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:46,201 INFO L225 Difference]: With dead ends: 299760 [2022-11-19 07:52:46,201 INFO L226 Difference]: Without dead ends: 196564 [2022-11-19 07:52:46,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:46,242 INFO L413 NwaCegarLoop]: 1046 mSDtfsCounter, 1931 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4690 mSolverCounterSat, 2016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 6706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2016 IncrementalHoareTripleChecker+Valid, 4690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:46,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1931 Valid, 1056 Invalid, 6706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2016 Valid, 4690 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-19 07:52:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196564 states. [2022-11-19 07:52:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196564 to 196564. [2022-11-19 07:52:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196564 states, 196563 states have (on average 1.1267278175445024) internal successors, (221473), 196563 states have internal predecessors, (221473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196564 states to 196564 states and 221473 transitions. [2022-11-19 07:52:49,370 INFO L78 Accepts]: Start accepts. Automaton has 196564 states and 221473 transitions. Word has length 1739 [2022-11-19 07:52:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:49,371 INFO L495 AbstractCegarLoop]: Abstraction has 196564 states and 221473 transitions. [2022-11-19 07:52:49,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 196564 states and 221473 transitions. [2022-11-19 07:52:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1756 [2022-11-19 07:52:49,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:49,537 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:49,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-19 07:52:49,537 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1132826096, now seen corresponding path program 1 times [2022-11-19 07:52:49,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:49,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560898087] [2022-11-19 07:52:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:49,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 07:52:50,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:50,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560898087] [2022-11-19 07:52:50,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560898087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:50,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:50,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:52:50,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49720014] [2022-11-19 07:52:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:50,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:50,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:50,853 INFO L87 Difference]: Start difference. First operand 196564 states and 221473 transitions. Second operand has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:00,834 INFO L93 Difference]: Finished difference Result 463560 states and 520137 transitions. [2022-11-19 07:53:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1755 [2022-11-19 07:53:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:01,149 INFO L225 Difference]: With dead ends: 463560 [2022-11-19 07:53:01,150 INFO L226 Difference]: Without dead ends: 266998 [2022-11-19 07:53:01,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:01,196 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 2754 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4651 mSolverCounterSat, 1848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2754 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 6499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1848 IncrementalHoareTripleChecker+Valid, 4651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:01,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2754 Valid, 330 Invalid, 6499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1848 Valid, 4651 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 07:53:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266998 states. [2022-11-19 07:53:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266998 to 234238. [2022-11-19 07:53:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234238 states, 234237 states have (on average 1.0968548948287418) internal successors, (256924), 234237 states have internal predecessors, (256924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234238 states to 234238 states and 256924 transitions. [2022-11-19 07:53:04,647 INFO L78 Accepts]: Start accepts. Automaton has 234238 states and 256924 transitions. Word has length 1755 [2022-11-19 07:53:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:04,648 INFO L495 AbstractCegarLoop]: Abstraction has 234238 states and 256924 transitions. [2022-11-19 07:53:04,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 234238 states and 256924 transitions. [2022-11-19 07:53:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2013 [2022-11-19 07:53:05,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:05,288 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:05,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-19 07:53:05,289 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1227191175, now seen corresponding path program 1 times [2022-11-19 07:53:05,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:05,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433548855] [2022-11-19 07:53:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat