./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh --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 a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 --- 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-2329fc7 [2022-12-14 04:44:00,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:44:00,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:44:00,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:44:00,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:44:00,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:44:00,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:44:00,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:44:00,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:44:00,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:44:00,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:44:00,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:44:00,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:44:00,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:44:00,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:44:00,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:44:00,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:44:00,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:44:00,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:44:00,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:44:00,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:44:00,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:44:00,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:44:00,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:44:00,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:44:00,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:44:00,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:44:00,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:44:00,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:44:00,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:44:00,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:44:01,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:44:01,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:44:01,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:44:01,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:44:01,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:44:01,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:44:01,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:44:01,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:44:01,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:44:01,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:44:01,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:44:01,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:44:01,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:44:01,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:44:01,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:44:01,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:44:01,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:44:01,029 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:44:01,029 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:44:01,029 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:44:01,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:44:01,029 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:44:01,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:44:01,030 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:44:01,030 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:44:01,030 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:44:01,030 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:44:01,031 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:44:01,031 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:44:01,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:44:01,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:44:01,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:44:01,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:44:01,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:44:01,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:44:01,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:44:01,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:44:01,033 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:44:01,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:44:01,033 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:44:01,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:44:01,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:44:01,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:44:01,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:44:01,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:44:01,034 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:44:01,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:44:01,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:44:01,035 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:44:01,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:44:01,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:44:01,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:44:01,035 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_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 [2022-12-14 04:44:01,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:44:01,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:44:01,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:44:01,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:44:01,224 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:44:01,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-12-14 04:44:03,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:44:03,990 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:44:03,990 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-12-14 04:44:03,998 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/data/e16a7dea5/c43ba55dab84468c92c12e1cd47b38bf/FLAG77d63f5c8 [2022-12-14 04:44:04,009 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/data/e16a7dea5/c43ba55dab84468c92c12e1cd47b38bf [2022-12-14 04:44:04,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:44:04,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:44:04,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:44:04,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:44:04,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:44:04,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1e1aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04, skipping insertion in model container [2022-12-14 04:44:04,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:44:04,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:44:04,155 WARN L237 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_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[914,927] [2022-12-14 04:44:04,192 WARN L237 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_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[7115,7128] [2022-12-14 04:44:04,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:44:04,236 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:44:04,245 WARN L237 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_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[914,927] [2022-12-14 04:44:04,259 WARN L237 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_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c[7115,7128] [2022-12-14 04:44:04,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:44:04,297 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:44:04,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04 WrapperNode [2022-12-14 04:44:04,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:44:04,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:44:04,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:44:04,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:44:04,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,345 INFO L138 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 581 [2022-12-14 04:44:04,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:44:04,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:44:04,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:44:04,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:44:04,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:44:04,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:44:04,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:44:04,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:44:04,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (1/1) ... [2022-12-14 04:44:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:44:04,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:04,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:44:04,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:44:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:44:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 04:44:04,461 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 04:44:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 04:44:04,461 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 04:44:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 04:44:04,461 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 04:44:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 04:44:04,462 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 04:44:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 04:44:04,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 04:44:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 04:44:04,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 04:44:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 04:44:04,462 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 04:44:04,463 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 04:44:04,463 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 04:44:04,463 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 04:44:04,463 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 04:44:04,463 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 04:44:04,463 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 04:44:04,463 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 04:44:04,463 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 04:44:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:44:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 04:44:04,464 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 04:44:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 04:44:04,464 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 04:44:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:44:04,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:44:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 04:44:04,464 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 04:44:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 04:44:04,465 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 04:44:04,538 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:44:04,541 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:44:04,971 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:44:05,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:44:05,144 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 04:44:05,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:44:05 BoogieIcfgContainer [2022-12-14 04:44:05,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:44:05,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:44:05,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:44:05,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:44:05,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:44:04" (1/3) ... [2022-12-14 04:44:05,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c60234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:44:05, skipping insertion in model container [2022-12-14 04:44:05,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:44:04" (2/3) ... [2022-12-14 04:44:05,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c60234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:44:05, skipping insertion in model container [2022-12-14 04:44:05,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:44:05" (3/3) ... [2022-12-14 04:44:05,153 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2022-12-14 04:44:05,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:44:05,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 04:44:05,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:44:05,206 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;@27d5eaa5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:44:05,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 04:44:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 134 states have internal predecessors, (191), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 04:44:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 04:44:05,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:05,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:05,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2110262807, now seen corresponding path program 1 times [2022-12-14 04:44:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:05,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465541876] [2022-12-14 04:44:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:05,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:05,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465541876] [2022-12-14 04:44:05,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465541876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:05,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:05,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:44:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230563420] [2022-12-14 04:44:05,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:05,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:44:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:44:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:44:05,593 INFO L87 Difference]: Start difference. First operand has 178 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 134 states have internal predecessors, (191), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:44:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:06,152 INFO L93 Difference]: Finished difference Result 412 states and 586 transitions. [2022-12-14 04:44:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 04:44:06,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-12-14 04:44:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:06,162 INFO L225 Difference]: With dead ends: 412 [2022-12-14 04:44:06,162 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 04:44:06,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:44:06,167 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 391 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:06,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 646 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 04:44:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 04:44:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-12-14 04:44:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 160 states have (on average 1.4125) internal successors, (226), 165 states have internal predecessors, (226), 42 states have call successors, (42), 22 states have call predecessors, (42), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 04:44:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2022-12-14 04:44:06,227 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 45 [2022-12-14 04:44:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:06,227 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2022-12-14 04:44:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:44:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2022-12-14 04:44:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 04:44:06,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:06,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:06,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:44:06,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash -912255885, now seen corresponding path program 1 times [2022-12-14 04:44:06,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:06,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853294132] [2022-12-14 04:44:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:06,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:06,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:06,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853294132] [2022-12-14 04:44:06,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853294132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:06,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:06,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:44:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420857615] [2022-12-14 04:44:06,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:44:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:44:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:44:06,350 INFO L87 Difference]: Start difference. First operand 224 states and 306 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 04:44:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:06,790 INFO L93 Difference]: Finished difference Result 672 states and 1005 transitions. [2022-12-14 04:44:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:44:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-12-14 04:44:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:06,794 INFO L225 Difference]: With dead ends: 672 [2022-12-14 04:44:06,794 INFO L226 Difference]: Without dead ends: 574 [2022-12-14 04:44:06,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:44:06,796 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 713 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:06,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 774 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 04:44:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-12-14 04:44:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 561. [2022-12-14 04:44:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 420 states have (on average 1.4333333333333333) internal successors, (602), 428 states have internal predecessors, (602), 95 states have call successors, (95), 46 states have call predecessors, (95), 44 states have return successors, (121), 88 states have call predecessors, (121), 91 states have call successors, (121) [2022-12-14 04:44:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 818 transitions. [2022-12-14 04:44:06,851 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 818 transitions. Word has length 44 [2022-12-14 04:44:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:06,852 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 818 transitions. [2022-12-14 04:44:06,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 04:44:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 818 transitions. [2022-12-14 04:44:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 04:44:06,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:06,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:06,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:44:06,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1664063119, now seen corresponding path program 1 times [2022-12-14 04:44:06,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:06,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937388561] [2022-12-14 04:44:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:06,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:06,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:06,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937388561] [2022-12-14 04:44:06,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937388561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:06,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:06,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695336039] [2022-12-14 04:44:06,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:06,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:06,916 INFO L87 Difference]: Start difference. First operand 561 states and 818 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:07,008 INFO L93 Difference]: Finished difference Result 786 states and 1105 transitions. [2022-12-14 04:44:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:07,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-12-14 04:44:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:07,013 INFO L225 Difference]: With dead ends: 786 [2022-12-14 04:44:07,013 INFO L226 Difference]: Without dead ends: 670 [2022-12-14 04:44:07,014 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 [2022-12-14 04:44:07,015 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 217 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:07,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 272 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:44:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-12-14 04:44:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 656. [2022-12-14 04:44:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 485 states have (on average 1.4061855670103092) internal successors, (682), 493 states have internal predecessors, (682), 111 states have call successors, (111), 60 states have call predecessors, (111), 58 states have return successors, (137), 104 states have call predecessors, (137), 107 states have call successors, (137) [2022-12-14 04:44:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 930 transitions. [2022-12-14 04:44:07,063 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 930 transitions. Word has length 46 [2022-12-14 04:44:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:07,064 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 930 transitions. [2022-12-14 04:44:07,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 930 transitions. [2022-12-14 04:44:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 04:44:07,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:07,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:07,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:44:07,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:07,067 INFO L85 PathProgramCache]: Analyzing trace with hash -905057485, now seen corresponding path program 1 times [2022-12-14 04:44:07,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:07,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712530423] [2022-12-14 04:44:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:07,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:07,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712530423] [2022-12-14 04:44:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712530423] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:07,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:07,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:07,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342148788] [2022-12-14 04:44:07,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:07,118 INFO L87 Difference]: Start difference. First operand 656 states and 930 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:07,208 INFO L93 Difference]: Finished difference Result 1020 states and 1378 transitions. [2022-12-14 04:44:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-12-14 04:44:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:07,212 INFO L225 Difference]: With dead ends: 1020 [2022-12-14 04:44:07,212 INFO L226 Difference]: Without dead ends: 810 [2022-12-14 04:44:07,213 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 [2022-12-14 04:44:07,214 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 68 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:07,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 392 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-12-14 04:44:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 806. [2022-12-14 04:44:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 590 states have (on average 1.3847457627118644) internal successors, (817), 598 states have internal predecessors, (817), 135 states have call successors, (135), 81 states have call predecessors, (135), 79 states have return successors, (161), 128 states have call predecessors, (161), 131 states have call successors, (161) [2022-12-14 04:44:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1113 transitions. [2022-12-14 04:44:07,259 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1113 transitions. Word has length 47 [2022-12-14 04:44:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:07,260 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1113 transitions. [2022-12-14 04:44:07,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1113 transitions. [2022-12-14 04:44:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 04:44:07,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:07,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:07,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 04:44:07,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -424121870, now seen corresponding path program 1 times [2022-12-14 04:44:07,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630073075] [2022-12-14 04:44:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:07,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630073075] [2022-12-14 04:44:07,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630073075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:07,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:07,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:07,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739747355] [2022-12-14 04:44:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:07,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:07,314 INFO L87 Difference]: Start difference. First operand 806 states and 1113 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:07,412 INFO L93 Difference]: Finished difference Result 1230 states and 1635 transitions. [2022-12-14 04:44:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:07,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-12-14 04:44:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:07,415 INFO L225 Difference]: With dead ends: 1230 [2022-12-14 04:44:07,416 INFO L226 Difference]: Without dead ends: 869 [2022-12-14 04:44:07,417 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 [2022-12-14 04:44:07,417 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 217 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:07,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 279 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:44:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-12-14 04:44:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 857. [2022-12-14 04:44:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 626 states have (on average 1.3722044728434504) internal successors, (859), 634 states have internal predecessors, (859), 143 states have call successors, (143), 88 states have call predecessors, (143), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-12-14 04:44:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1171 transitions. [2022-12-14 04:44:07,461 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1171 transitions. Word has length 53 [2022-12-14 04:44:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:07,462 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1171 transitions. [2022-12-14 04:44:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1171 transitions. [2022-12-14 04:44:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 04:44:07,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:07,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:44:07,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:07,463 INFO L85 PathProgramCache]: Analyzing trace with hash -779246631, now seen corresponding path program 1 times [2022-12-14 04:44:07,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:07,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619357757] [2022-12-14 04:44:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:07,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:07,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619357757] [2022-12-14 04:44:07,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619357757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:07,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:07,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:44:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437597024] [2022-12-14 04:44:07,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:07,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:44:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:44:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:44:07,520 INFO L87 Difference]: Start difference. First operand 857 states and 1171 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 04:44:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:07,720 INFO L93 Difference]: Finished difference Result 966 states and 1303 transitions. [2022-12-14 04:44:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:44:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-12-14 04:44:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:07,723 INFO L225 Difference]: With dead ends: 966 [2022-12-14 04:44:07,723 INFO L226 Difference]: Without dead ends: 963 [2022-12-14 04:44:07,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:44:07,724 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 392 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:07,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 258 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-12-14 04:44:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 856. [2022-12-14 04:44:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 626 states have (on average 1.3674121405750799) internal successors, (856), 633 states have internal predecessors, (856), 142 states have call successors, (142), 88 states have call predecessors, (142), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-12-14 04:44:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1167 transitions. [2022-12-14 04:44:07,773 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1167 transitions. Word has length 54 [2022-12-14 04:44:07,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:07,773 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1167 transitions. [2022-12-14 04:44:07,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 04:44:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1167 transitions. [2022-12-14 04:44:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 04:44:07,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:07,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:07,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 04:44:07,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:07,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1612283676, now seen corresponding path program 1 times [2022-12-14 04:44:07,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:07,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108362647] [2022-12-14 04:44:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:07,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:07,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108362647] [2022-12-14 04:44:07,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108362647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433661028] [2022-12-14 04:44:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:07,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:07,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:07,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:44:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:44:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:08,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:08,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433661028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240573678] [2022-12-14 04:44:08,341 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 04:44:08,341 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:44:08,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:44:08,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:44:08,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:44:10,331 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-12-14 04:44:10,344 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 121 for LOIs [2022-12-14 04:44:10,355 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-12-14 04:44:10,591 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-12-14 04:44:10,620 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-12-14 04:44:10,650 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-12-14 04:44:10,663 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-12-14 04:44:10,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:44:19,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [240573678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:19,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:44:19,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-12-14 04:44:19,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778465134] [2022-12-14 04:44:19,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:19,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 04:44:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 04:44:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 04:44:19,818 INFO L87 Difference]: Start difference. First operand 856 states and 1167 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 04:44:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:34,082 INFO L93 Difference]: Finished difference Result 1315 states and 1714 transitions. [2022-12-14 04:44:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 04:44:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-12-14 04:44:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:34,086 INFO L225 Difference]: With dead ends: 1315 [2022-12-14 04:44:34,086 INFO L226 Difference]: Without dead ends: 905 [2022-12-14 04:44:34,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 04:44:34,088 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 161 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:34,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 2214 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 04:44:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-12-14 04:44:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 890. [2022-12-14 04:44:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 652 states have (on average 1.3558282208588956) internal successors, (884), 659 states have internal predecessors, (884), 144 states have call successors, (144), 94 states have call predecessors, (144), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2022-12-14 04:44:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1199 transitions. [2022-12-14 04:44:34,155 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1199 transitions. Word has length 55 [2022-12-14 04:44:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:34,156 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1199 transitions. [2022-12-14 04:44:34,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 04:44:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1199 transitions. [2022-12-14 04:44:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 04:44:34,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:34,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:34,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:44:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:34,358 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash 326009013, now seen corresponding path program 1 times [2022-12-14 04:44:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:34,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123196518] [2022-12-14 04:44:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:44:34,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123196518] [2022-12-14 04:44:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123196518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:34,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:34,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584725970] [2022-12-14 04:44:34,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:34,415 INFO L87 Difference]: Start difference. First operand 890 states and 1199 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:34,534 INFO L93 Difference]: Finished difference Result 1341 states and 1755 transitions. [2022-12-14 04:44:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-12-14 04:44:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:34,538 INFO L225 Difference]: With dead ends: 1341 [2022-12-14 04:44:34,538 INFO L226 Difference]: Without dead ends: 1073 [2022-12-14 04:44:34,539 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 [2022-12-14 04:44:34,539 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:34,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 439 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-12-14 04:44:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 944. [2022-12-14 04:44:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 696 states have (on average 1.3548850574712643) internal successors, (943), 703 states have internal predecessors, (943), 149 states have call successors, (149), 99 states have call predecessors, (149), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2022-12-14 04:44:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1268 transitions. [2022-12-14 04:44:34,625 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1268 transitions. Word has length 61 [2022-12-14 04:44:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:34,626 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1268 transitions. [2022-12-14 04:44:34,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1268 transitions. [2022-12-14 04:44:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 04:44:34,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:34,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:34,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 04:44:34,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1449452477, now seen corresponding path program 1 times [2022-12-14 04:44:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:34,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67132399] [2022-12-14 04:44:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:34,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:34,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67132399] [2022-12-14 04:44:34,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67132399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:34,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:34,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:44:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105823260] [2022-12-14 04:44:34,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:34,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:44:34,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:44:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:44:34,761 INFO L87 Difference]: Start difference. First operand 944 states and 1268 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 04:44:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:35,262 INFO L93 Difference]: Finished difference Result 1624 states and 2085 transitions. [2022-12-14 04:44:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 04:44:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-12-14 04:44:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:35,268 INFO L225 Difference]: With dead ends: 1624 [2022-12-14 04:44:35,268 INFO L226 Difference]: Without dead ends: 1207 [2022-12-14 04:44:35,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:44:35,269 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 352 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:35,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 602 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:44:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-12-14 04:44:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1172. [2022-12-14 04:44:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 849 states have (on average 1.3262661955241462) internal successors, (1126), 856 states have internal predecessors, (1126), 189 states have call successors, (189), 134 states have call predecessors, (189), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2022-12-14 04:44:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1531 transitions. [2022-12-14 04:44:35,398 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1531 transitions. Word has length 63 [2022-12-14 04:44:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:35,398 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1531 transitions. [2022-12-14 04:44:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 04:44:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1531 transitions. [2022-12-14 04:44:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 04:44:35,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:35,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 04:44:35,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1314355688, now seen corresponding path program 1 times [2022-12-14 04:44:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791460222] [2022-12-14 04:44:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:35,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791460222] [2022-12-14 04:44:35,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791460222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600746097] [2022-12-14 04:44:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:35,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:35,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:35,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:44:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:44:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:44:35,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600746097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:35,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072589678] [2022-12-14 04:44:35,829 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 04:44:35,830 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:44:35,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:44:35,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:44:35,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:44:40,831 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-12-14 04:44:40,843 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-12-14 04:44:40,875 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 164 for LOIs [2022-12-14 04:44:40,913 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-12-14 04:44:41,124 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-12-14 04:44:41,154 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-12-14 04:44:41,185 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-12-14 04:44:41,198 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-12-14 04:44:41,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:44:54,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24974#(and (= ~q_req_up~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 04:44:54,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:44:54,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:44:54,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 04:44:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094703880] [2022-12-14 04:44:54,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:44:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:44:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 04:44:54,028 INFO L87 Difference]: Start difference. First operand 1172 states and 1531 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 04:44:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:54,553 INFO L93 Difference]: Finished difference Result 2717 states and 3398 transitions. [2022-12-14 04:44:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:44:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-12-14 04:44:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:54,559 INFO L225 Difference]: With dead ends: 2717 [2022-12-14 04:44:54,559 INFO L226 Difference]: Without dead ends: 2714 [2022-12-14 04:44:54,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 04:44:54,560 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 505 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:54,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 838 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:44:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-12-14 04:44:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1912. [2022-12-14 04:44:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1367 states have (on average 1.3050475493782003) internal successors, (1784), 1374 states have internal predecessors, (1784), 307 states have call successors, (307), 238 states have call predecessors, (307), 236 states have return successors, (334), 301 states have call predecessors, (334), 304 states have call successors, (334) [2022-12-14 04:44:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2425 transitions. [2022-12-14 04:44:54,706 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2425 transitions. Word has length 64 [2022-12-14 04:44:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:54,707 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 2425 transitions. [2022-12-14 04:44:54,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 04:44:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2425 transitions. [2022-12-14 04:44:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 04:44:54,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:54,708 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:54,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:44:54,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 04:44:54,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1052406133, now seen corresponding path program 2 times [2022-12-14 04:44:54,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:54,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618547738] [2022-12-14 04:44:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:54,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:54,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:54,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618547738] [2022-12-14 04:44:54,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618547738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:54,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:54,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:54,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854588931] [2022-12-14 04:44:54,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:54,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:54,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:54,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:54,938 INFO L87 Difference]: Start difference. First operand 1912 states and 2425 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:55,163 INFO L93 Difference]: Finished difference Result 2680 states and 3357 transitions. [2022-12-14 04:44:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:55,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-12-14 04:44:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:55,169 INFO L225 Difference]: With dead ends: 2680 [2022-12-14 04:44:55,169 INFO L226 Difference]: Without dead ends: 1490 [2022-12-14 04:44:55,170 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 [2022-12-14 04:44:55,171 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 217 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:55,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 315 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-12-14 04:44:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1480. [2022-12-14 04:44:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1063 states have (on average 1.303857008466604) internal successors, (1386), 1070 states have internal predecessors, (1386), 239 states have call successors, (239), 178 states have call predecessors, (239), 176 states have return successors, (266), 233 states have call predecessors, (266), 236 states have call successors, (266) [2022-12-14 04:44:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1891 transitions. [2022-12-14 04:44:55,288 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1891 transitions. Word has length 67 [2022-12-14 04:44:55,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:55,288 INFO L495 AbstractCegarLoop]: Abstraction has 1480 states and 1891 transitions. [2022-12-14 04:44:55,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1891 transitions. [2022-12-14 04:44:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 04:44:55,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:55,289 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:55,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 04:44:55,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:55,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1213544437, now seen corresponding path program 1 times [2022-12-14 04:44:55,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:55,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912898493] [2022-12-14 04:44:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:55,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:55,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912898493] [2022-12-14 04:44:55,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912898493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:55,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:55,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243716039] [2022-12-14 04:44:55,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:55,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:55,321 INFO L87 Difference]: Start difference. First operand 1480 states and 1891 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:55,579 INFO L93 Difference]: Finished difference Result 2511 states and 3124 transitions. [2022-12-14 04:44:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-12-14 04:44:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:55,586 INFO L225 Difference]: With dead ends: 2511 [2022-12-14 04:44:55,586 INFO L226 Difference]: Without dead ends: 1654 [2022-12-14 04:44:55,588 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 [2022-12-14 04:44:55,588 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 39 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:55,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 430 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-12-14 04:44:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1525. [2022-12-14 04:44:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1100 states have (on average 1.3) internal successors, (1430), 1107 states have internal predecessors, (1430), 243 states have call successors, (243), 182 states have call predecessors, (243), 180 states have return successors, (270), 237 states have call predecessors, (270), 240 states have call successors, (270) [2022-12-14 04:44:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 1943 transitions. [2022-12-14 04:44:55,750 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 1943 transitions. Word has length 71 [2022-12-14 04:44:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:55,751 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 1943 transitions. [2022-12-14 04:44:55,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 1943 transitions. [2022-12-14 04:44:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 04:44:55,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:55,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:55,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 04:44:55,753 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash 748007221, now seen corresponding path program 1 times [2022-12-14 04:44:55,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:55,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606608331] [2022-12-14 04:44:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:55,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:44:55,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606608331] [2022-12-14 04:44:55,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606608331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392862527] [2022-12-14 04:44:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:55,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:55,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:55,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:55,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:44:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:44:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:44:55,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:44:55,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392862527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:55,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:44:55,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 04:44:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652318580] [2022-12-14 04:44:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:55,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:44:55,952 INFO L87 Difference]: Start difference. First operand 1525 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:56,168 INFO L93 Difference]: Finished difference Result 2379 states and 3279 transitions. [2022-12-14 04:44:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-12-14 04:44:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:56,172 INFO L225 Difference]: With dead ends: 2379 [2022-12-14 04:44:56,172 INFO L226 Difference]: Without dead ends: 1944 [2022-12-14 04:44:56,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:44:56,174 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 208 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:56,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-12-14 04:44:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1935. [2022-12-14 04:44:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1418 states have (on average 1.3293370944992948) internal successors, (1885), 1428 states have internal predecessors, (1885), 305 states have call successors, (305), 212 states have call predecessors, (305), 210 states have return successors, (358), 296 states have call predecessors, (358), 302 states have call successors, (358) [2022-12-14 04:44:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2548 transitions. [2022-12-14 04:44:56,314 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2548 transitions. Word has length 81 [2022-12-14 04:44:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:56,314 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2548 transitions. [2022-12-14 04:44:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2548 transitions. [2022-12-14 04:44:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 04:44:56,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:56,316 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:56,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 04:44:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 04:44:56,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1843723093, now seen corresponding path program 1 times [2022-12-14 04:44:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886706464] [2022-12-14 04:44:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:44:56,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886706464] [2022-12-14 04:44:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886706464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365680014] [2022-12-14 04:44:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:56,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:56,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:44:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:56,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:44:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 04:44:56,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:44:56,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365680014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:56,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:44:56,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 04:44:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074452032] [2022-12-14 04:44:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:44:56,727 INFO L87 Difference]: Start difference. First operand 1935 states and 2548 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:56,991 INFO L93 Difference]: Finished difference Result 3594 states and 5114 transitions. [2022-12-14 04:44:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-12-14 04:44:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:56,998 INFO L225 Difference]: With dead ends: 3594 [2022-12-14 04:44:56,999 INFO L226 Difference]: Without dead ends: 2749 [2022-12-14 04:44:57,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:44:57,002 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 211 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:57,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2022-12-14 04:44:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2735. [2022-12-14 04:44:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2039 states have (on average 1.356056890632663) internal successors, (2765), 2055 states have internal predecessors, (2765), 424 states have call successors, (424), 272 states have call predecessors, (424), 270 states have return successors, (525), 409 states have call predecessors, (525), 421 states have call successors, (525) [2022-12-14 04:44:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3714 transitions. [2022-12-14 04:44:57,213 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3714 transitions. Word has length 81 [2022-12-14 04:44:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:57,213 INFO L495 AbstractCegarLoop]: Abstraction has 2735 states and 3714 transitions. [2022-12-14 04:44:57,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 04:44:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3714 transitions. [2022-12-14 04:44:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 04:44:57,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:57,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:57,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:44:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:44:57,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:57,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1731151051, now seen corresponding path program 1 times [2022-12-14 04:44:57,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:57,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523933556] [2022-12-14 04:44:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 04:44:57,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:57,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523933556] [2022-12-14 04:44:57,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523933556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:57,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:44:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416084105] [2022-12-14 04:44:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:44:57,495 INFO L87 Difference]: Start difference. First operand 2735 states and 3714 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:57,840 INFO L93 Difference]: Finished difference Result 4435 states and 6329 transitions. [2022-12-14 04:44:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-12-14 04:44:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:57,860 INFO L225 Difference]: With dead ends: 4435 [2022-12-14 04:44:57,860 INFO L226 Difference]: Without dead ends: 3111 [2022-12-14 04:44:57,865 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 [2022-12-14 04:44:57,866 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 56 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:57,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 459 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-12-14 04:44:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2939. [2022-12-14 04:44:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2227 states have (on average 1.3834755276156263) internal successors, (3081), 2243 states have internal predecessors, (3081), 432 states have call successors, (432), 280 states have call predecessors, (432), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-12-14 04:44:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 4046 transitions. [2022-12-14 04:44:58,159 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 4046 transitions. Word has length 81 [2022-12-14 04:44:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:58,159 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 4046 transitions. [2022-12-14 04:44:58,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 04:44:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 4046 transitions. [2022-12-14 04:44:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 04:44:58,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:58,164 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:58,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 04:44:58,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1683230165, now seen corresponding path program 1 times [2022-12-14 04:44:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:58,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193544126] [2022-12-14 04:44:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 04:44:58,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193544126] [2022-12-14 04:44:58,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193544126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772439002] [2022-12-14 04:44:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:58,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:58,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:44:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:44:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:44:58,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:44:58,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772439002] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:58,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:44:58,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-12-14 04:44:58,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463041534] [2022-12-14 04:44:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:58,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:44:58,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:58,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:44:58,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 04:44:58,510 INFO L87 Difference]: Start difference. First operand 2939 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 04:44:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:58,774 INFO L93 Difference]: Finished difference Result 3768 states and 5064 transitions. [2022-12-14 04:44:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:44:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-12-14 04:44:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:58,782 INFO L225 Difference]: With dead ends: 3768 [2022-12-14 04:44:58,782 INFO L226 Difference]: Without dead ends: 2968 [2022-12-14 04:44:58,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 04:44:58,784 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 47 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:58,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 442 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:44:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2022-12-14 04:44:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2935. [2022-12-14 04:44:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2223 states have (on average 1.369770580296896) internal successors, (3045), 2239 states have internal predecessors, (3045), 432 states have call successors, (432), 280 states have call predecessors, (432), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-12-14 04:44:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 4010 transitions. [2022-12-14 04:44:58,988 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 4010 transitions. Word has length 102 [2022-12-14 04:44:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:58,988 INFO L495 AbstractCegarLoop]: Abstraction has 2935 states and 4010 transitions. [2022-12-14 04:44:58,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 04:44:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 4010 transitions. [2022-12-14 04:44:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 04:44:58,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:58,991 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:58,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:44:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:59,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:44:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -106672406, now seen corresponding path program 1 times [2022-12-14 04:44:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:44:59,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449733646] [2022-12-14 04:44:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:44:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 04:44:59,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:44:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449733646] [2022-12-14 04:44:59,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449733646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401117224] [2022-12-14 04:44:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:59,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:59,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:59,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:59,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:44:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:44:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:44:59,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:44:59,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401117224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:59,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:44:59,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 04:44:59,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117370245] [2022-12-14 04:44:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:59,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:44:59,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:44:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:44:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:44:59,546 INFO L87 Difference]: Start difference. First operand 2935 states and 4010 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 04:44:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:59,990 INFO L93 Difference]: Finished difference Result 3819 states and 5080 transitions. [2022-12-14 04:44:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:44:59,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-12-14 04:44:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:59,998 INFO L225 Difference]: With dead ends: 3819 [2022-12-14 04:44:59,998 INFO L226 Difference]: Without dead ends: 2766 [2022-12-14 04:44:59,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:45:00,000 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 208 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:00,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 914 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-12-14 04:45:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2569. [2022-12-14 04:45:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 1989 states have (on average 1.3926596279537455) internal successors, (2770), 2005 states have internal predecessors, (2770), 361 states have call successors, (361), 219 states have call predecessors, (361), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-12-14 04:45:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3593 transitions. [2022-12-14 04:45:00,223 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3593 transitions. Word has length 102 [2022-12-14 04:45:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:00,223 INFO L495 AbstractCegarLoop]: Abstraction has 2569 states and 3593 transitions. [2022-12-14 04:45:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 04:45:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3593 transitions. [2022-12-14 04:45:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 04:45:00,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:00,231 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:00,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:45:00,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 04:45:00,431 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1035450663, now seen corresponding path program 1 times [2022-12-14 04:45:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637534480] [2022-12-14 04:45:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:00,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 04:45:00,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:00,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637534480] [2022-12-14 04:45:00,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637534480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:00,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:00,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:00,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273394219] [2022-12-14 04:45:00,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:00,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:00,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:00,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:00,474 INFO L87 Difference]: Start difference. First operand 2569 states and 3593 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 04:45:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:00,829 INFO L93 Difference]: Finished difference Result 3188 states and 4335 transitions. [2022-12-14 04:45:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-12-14 04:45:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:00,843 INFO L225 Difference]: With dead ends: 3188 [2022-12-14 04:45:00,844 INFO L226 Difference]: Without dead ends: 2568 [2022-12-14 04:45:00,845 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 [2022-12-14 04:45:00,846 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 269 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:00,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 395 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2022-12-14 04:45:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2559. [2022-12-14 04:45:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1979 states have (on average 1.3815058110156644) internal successors, (2734), 1995 states have internal predecessors, (2734), 361 states have call successors, (361), 219 states have call predecessors, (361), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-12-14 04:45:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3557 transitions. [2022-12-14 04:45:01,181 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3557 transitions. Word has length 112 [2022-12-14 04:45:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:01,181 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 3557 transitions. [2022-12-14 04:45:01,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 04:45:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3557 transitions. [2022-12-14 04:45:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 04:45:01,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:01,187 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 04:45:01,188 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 857991512, now seen corresponding path program 1 times [2022-12-14 04:45:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892593947] [2022-12-14 04:45:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:01,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:45:01,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892593947] [2022-12-14 04:45:01,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892593947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910897157] [2022-12-14 04:45:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:01,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:01,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:01,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:01,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:45:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:01,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 04:45:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:45:01,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:45:01,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910897157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:01,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:45:01,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 04:45:01,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489196100] [2022-12-14 04:45:01,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:01,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:45:01,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:45:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 04:45:01,448 INFO L87 Difference]: Start difference. First operand 2559 states and 3557 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 04:45:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:01,840 INFO L93 Difference]: Finished difference Result 3108 states and 4182 transitions. [2022-12-14 04:45:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:45:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-12-14 04:45:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:01,847 INFO L225 Difference]: With dead ends: 3108 [2022-12-14 04:45:01,847 INFO L226 Difference]: Without dead ends: 2515 [2022-12-14 04:45:01,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:45:01,849 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 63 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:01,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1126 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-12-14 04:45:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2423. [2022-12-14 04:45:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 1879 states have (on average 1.3927621075039915) internal successors, (2617), 1895 states have internal predecessors, (2617), 342 states have call successors, (342), 202 states have call predecessors, (342), 200 states have return successors, (443), 327 states have call predecessors, (443), 339 states have call successors, (443) [2022-12-14 04:45:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3402 transitions. [2022-12-14 04:45:02,057 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3402 transitions. Word has length 112 [2022-12-14 04:45:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:02,057 INFO L495 AbstractCegarLoop]: Abstraction has 2423 states and 3402 transitions. [2022-12-14 04:45:02,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 04:45:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3402 transitions. [2022-12-14 04:45:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 04:45:02,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:02,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:02,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:45:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:02,261 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash -439997459, now seen corresponding path program 1 times [2022-12-14 04:45:02,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:02,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171222458] [2022-12-14 04:45:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 04:45:02,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171222458] [2022-12-14 04:45:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171222458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:02,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:45:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108538727] [2022-12-14 04:45:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:45:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:45:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:45:02,338 INFO L87 Difference]: Start difference. First operand 2423 states and 3402 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:45:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:02,721 INFO L93 Difference]: Finished difference Result 6032 states and 8939 transitions. [2022-12-14 04:45:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:45:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-12-14 04:45:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:02,732 INFO L225 Difference]: With dead ends: 6032 [2022-12-14 04:45:02,732 INFO L226 Difference]: Without dead ends: 4183 [2022-12-14 04:45:02,740 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 [2022-12-14 04:45:02,740 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 205 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:02,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 323 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2022-12-14 04:45:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 4151. [2022-12-14 04:45:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4151 states, 3243 states have (on average 1.406413814369411) internal successors, (4561), 3271 states have internal predecessors, (4561), 578 states have call successors, (578), 330 states have call predecessors, (578), 328 states have return successors, (767), 551 states have call predecessors, (767), 575 states have call successors, (767) [2022-12-14 04:45:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4151 states to 4151 states and 5906 transitions. [2022-12-14 04:45:03,053 INFO L78 Accepts]: Start accepts. Automaton has 4151 states and 5906 transitions. Word has length 107 [2022-12-14 04:45:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:03,053 INFO L495 AbstractCegarLoop]: Abstraction has 4151 states and 5906 transitions. [2022-12-14 04:45:03,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:45:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4151 states and 5906 transitions. [2022-12-14 04:45:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 04:45:03,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:03,058 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:03,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 04:45:03,058 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash 200628638, now seen corresponding path program 1 times [2022-12-14 04:45:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:03,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518577947] [2022-12-14 04:45:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:03,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 04:45:03,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518577947] [2022-12-14 04:45:03,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518577947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829256230] [2022-12-14 04:45:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:03,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:03,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:03,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:03,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:45:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 04:45:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 04:45:03,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:45:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829256230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:03,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:45:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 04:45:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809936109] [2022-12-14 04:45:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:03,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:45:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:45:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:45:03,290 INFO L87 Difference]: Start difference. First operand 4151 states and 5906 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 04:45:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:03,844 INFO L93 Difference]: Finished difference Result 4900 states and 6751 transitions. [2022-12-14 04:45:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:45:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-12-14 04:45:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:03,854 INFO L225 Difference]: With dead ends: 4900 [2022-12-14 04:45:03,854 INFO L226 Difference]: Without dead ends: 4443 [2022-12-14 04:45:03,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 04:45:03,856 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 193 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:03,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 998 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:03,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4443 states. [2022-12-14 04:45:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4443 to 4409. [2022-12-14 04:45:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 3405 states have (on average 1.3923641703377385) internal successors, (4741), 3439 states have internal predecessors, (4741), 626 states have call successors, (626), 372 states have call predecessors, (626), 376 states have return successors, (827), 599 states have call predecessors, (827), 623 states have call successors, (827) [2022-12-14 04:45:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 6194 transitions. [2022-12-14 04:45:04,190 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 6194 transitions. Word has length 113 [2022-12-14 04:45:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:04,190 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 6194 transitions. [2022-12-14 04:45:04,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 04:45:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 6194 transitions. [2022-12-14 04:45:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 04:45:04,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:04,195 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:04,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 04:45:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:04,397 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1652565966, now seen corresponding path program 1 times [2022-12-14 04:45:04,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:04,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224625563] [2022-12-14 04:45:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 04:45:04,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224625563] [2022-12-14 04:45:04,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224625563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039751159] [2022-12-14 04:45:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:04,894 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:04,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:45:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 04:45:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:45:05,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 04:45:06,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039751159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986814759] [2022-12-14 04:45:06,813 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 04:45:06,813 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:45:06,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:45:06,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:45:06,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:45:32,302 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-12-14 04:45:32,527 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-12-14 04:45:32,560 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 154 for LOIs [2022-12-14 04:45:32,594 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-12-14 04:45:33,675 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-12-14 04:45:33,814 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 78 for LOIs [2022-12-14 04:45:33,930 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-12-14 04:45:34,379 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-12-14 04:45:34,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:46:01,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '135581#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 04:46:01,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:46:01,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:46:01,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 04:46:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865605983] [2022-12-14 04:46:01,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:46:01,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 04:46:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:46:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 04:46:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10763, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 04:46:01,856 INFO L87 Difference]: Start difference. First operand 4409 states and 6194 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 04:46:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:46:18,405 INFO L93 Difference]: Finished difference Result 6920 states and 9110 transitions. [2022-12-14 04:46:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 04:46:18,405 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-12-14 04:46:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:46:18,416 INFO L225 Difference]: With dead ends: 6920 [2022-12-14 04:46:18,416 INFO L226 Difference]: Without dead ends: 6205 [2022-12-14 04:46:18,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44279 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=10080, Invalid=99812, Unknown=0, NotChecked=0, Total=109892 [2022-12-14 04:46:18,429 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 3985 mSDsluCounter, 2920 mSDsCounter, 0 mSdLazyCounter, 7402 mSolverCounterSat, 2164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3985 SdHoareTripleChecker+Valid, 3114 SdHoareTripleChecker+Invalid, 9566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2164 IncrementalHoareTripleChecker+Valid, 7402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:46:18,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3985 Valid, 3114 Invalid, 9566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2164 Valid, 7402 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 04:46:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2022-12-14 04:46:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 4685. [2022-12-14 04:46:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3589 states have (on average 1.379771524101421) internal successors, (4952), 3625 states have internal predecessors, (4952), 671 states have call successors, (671), 409 states have call predecessors, (671), 423 states have return successors, (884), 652 states have call predecessors, (884), 668 states have call successors, (884) [2022-12-14 04:46:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6507 transitions. [2022-12-14 04:46:18,908 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6507 transitions. Word has length 114 [2022-12-14 04:46:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:46:18,908 INFO L495 AbstractCegarLoop]: Abstraction has 4685 states and 6507 transitions. [2022-12-14 04:46:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 04:46:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6507 transitions. [2022-12-14 04:46:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 04:46:18,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:46:18,918 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:46:18,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 04:46:19,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 04:46:19,119 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:46:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:46:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1142865687, now seen corresponding path program 1 times [2022-12-14 04:46:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:46:19,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146844348] [2022-12-14 04:46:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:46:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 04:46:19,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:46:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146844348] [2022-12-14 04:46:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146844348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:46:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350011182] [2022-12-14 04:46:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:19,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:46:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:46:19,320 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:46:19,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:46:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:46:19,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 04:46:19,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:46:19,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350011182] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 04:46:19,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:46:19,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 04:46:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327945152] [2022-12-14 04:46:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:46:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:46:19,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:46:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:46:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:46:19,608 INFO L87 Difference]: Start difference. First operand 4685 states and 6507 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 04:46:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:46:20,429 INFO L93 Difference]: Finished difference Result 6009 states and 8055 transitions. [2022-12-14 04:46:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 04:46:20,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-12-14 04:46:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:46:20,440 INFO L225 Difference]: With dead ends: 6009 [2022-12-14 04:46:20,440 INFO L226 Difference]: Without dead ends: 5018 [2022-12-14 04:46:20,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 04:46:20,444 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 327 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:46:20,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 471 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:46:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2022-12-14 04:46:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 4765. [2022-12-14 04:46:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 3634 states have (on average 1.3767198679141441) internal successors, (5003), 3673 states have internal predecessors, (5003), 690 states have call successors, (690), 418 states have call predecessors, (690), 439 states have return successors, (924), 675 states have call predecessors, (924), 687 states have call successors, (924) [2022-12-14 04:46:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 6617 transitions. [2022-12-14 04:46:20,975 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 6617 transitions. Word has length 115 [2022-12-14 04:46:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:46:20,975 INFO L495 AbstractCegarLoop]: Abstraction has 4765 states and 6617 transitions. [2022-12-14 04:46:20,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 04:46:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 6617 transitions. [2022-12-14 04:46:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 04:46:20,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:46:20,980 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:46:20,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 04:46:21,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 04:46:21,181 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:46:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:46:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash -647108895, now seen corresponding path program 1 times [2022-12-14 04:46:21,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:46:21,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49861943] [2022-12-14 04:46:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:21,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:46:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:46:21,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:46:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49861943] [2022-12-14 04:46:21,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49861943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:46:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455547687] [2022-12-14 04:46:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:21,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:46:21,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:46:21,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:46:21,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:46:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 04:46:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:46:22,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:46:23,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455547687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:23,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706282365] [2022-12-14 04:46:23,497 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 04:46:23,497 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:46:23,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:46:23,498 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:46:23,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:46:30,047 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-12-14 04:46:30,485 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 161 for LOIs [2022-12-14 04:46:30,563 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 80 for LOIs [2022-12-14 04:46:30,570 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-12-14 04:46:31,708 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-12-14 04:46:31,855 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 80 for LOIs [2022-12-14 04:46:31,976 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-12-14 04:46:32,283 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-12-14 04:46:32,579 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:46:55,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169919#(and (= ~q_req_up~0 1) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 04:46:55,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:46:55,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:46:55,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 04:46:55,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999459345] [2022-12-14 04:46:55,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:46:55,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 04:46:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:46:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 04:46:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=11697, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 04:46:55,593 INFO L87 Difference]: Start difference. First operand 4765 states and 6617 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 04:47:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:08,071 INFO L93 Difference]: Finished difference Result 7049 states and 9319 transitions. [2022-12-14 04:47:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 04:47:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-12-14 04:47:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:08,081 INFO L225 Difference]: With dead ends: 7049 [2022-12-14 04:47:08,081 INFO L226 Difference]: Without dead ends: 5978 [2022-12-14 04:47:08,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26863 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=6757, Invalid=62675, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 04:47:08,087 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 4886 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 8316 mSolverCounterSat, 3520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4886 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 11836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3520 IncrementalHoareTripleChecker+Valid, 8316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:08,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4886 Valid, 3064 Invalid, 11836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3520 Valid, 8316 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 04:47:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2022-12-14 04:47:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4581. [2022-12-14 04:47:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 3522 states have (on average 1.3841567291311754) internal successors, (4875), 3560 states have internal predecessors, (4875), 650 states have call successors, (650), 386 states have call predecessors, (650), 407 states have return successors, (874), 636 states have call predecessors, (874), 647 states have call successors, (874) [2022-12-14 04:47:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 6399 transitions. [2022-12-14 04:47:08,699 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 6399 transitions. Word has length 124 [2022-12-14 04:47:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:08,699 INFO L495 AbstractCegarLoop]: Abstraction has 4581 states and 6399 transitions. [2022-12-14 04:47:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 04:47:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 6399 transitions. [2022-12-14 04:47:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 04:47:08,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:08,704 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:08,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 04:47:08,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 04:47:08,905 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash 832167964, now seen corresponding path program 1 times [2022-12-14 04:47:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:08,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234813858] [2022-12-14 04:47:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 04:47:09,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:09,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234813858] [2022-12-14 04:47:09,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234813858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:09,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024561036] [2022-12-14 04:47:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:09,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:09,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:09,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:47:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:47:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 04:47:09,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 04:47:09,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024561036] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:09,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 04:47:09,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 04:47:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668407766] [2022-12-14 04:47:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:09,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:47:09,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:47:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:47:09,331 INFO L87 Difference]: Start difference. First operand 4581 states and 6399 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 04:47:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:10,186 INFO L93 Difference]: Finished difference Result 5236 states and 7140 transitions. [2022-12-14 04:47:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 04:47:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-12-14 04:47:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:10,194 INFO L225 Difference]: With dead ends: 5236 [2022-12-14 04:47:10,194 INFO L226 Difference]: Without dead ends: 4349 [2022-12-14 04:47:10,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:47:10,197 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 443 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:10,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 450 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:47:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2022-12-14 04:47:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 4312. [2022-12-14 04:47:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 3323 states have (on average 1.393319289798375) internal successors, (4630), 3361 states have internal predecessors, (4630), 614 states have call successors, (614), 356 states have call predecessors, (614), 373 states have return successors, (833), 596 states have call predecessors, (833), 611 states have call successors, (833) [2022-12-14 04:47:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6077 transitions. [2022-12-14 04:47:10,774 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6077 transitions. Word has length 125 [2022-12-14 04:47:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:10,775 INFO L495 AbstractCegarLoop]: Abstraction has 4312 states and 6077 transitions. [2022-12-14 04:47:10,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 04:47:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6077 transitions. [2022-12-14 04:47:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 04:47:10,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:10,787 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, 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] [2022-12-14 04:47:10,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 04:47:10,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:10,988 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1968070528, now seen corresponding path program 1 times [2022-12-14 04:47:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:10,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309638854] [2022-12-14 04:47:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:10,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 04:47:11,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:11,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309638854] [2022-12-14 04:47:11,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309638854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:11,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10273547] [2022-12-14 04:47:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:11,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:11,064 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:11,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 04:47:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:47:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 04:47:11,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:11,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10273547] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:11,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:11,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 04:47:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524199186] [2022-12-14 04:47:11,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:11,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:47:11,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:47:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:11,189 INFO L87 Difference]: Start difference. First operand 4312 states and 6077 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:11,786 INFO L93 Difference]: Finished difference Result 7317 states and 10496 transitions. [2022-12-14 04:47:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:47:11,787 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2022-12-14 04:47:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:11,797 INFO L225 Difference]: With dead ends: 7317 [2022-12-14 04:47:11,797 INFO L226 Difference]: Without dead ends: 5197 [2022-12-14 04:47:11,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:11,803 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:11,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 241 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:47:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2022-12-14 04:47:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 5197. [2022-12-14 04:47:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 4093 states have (on average 1.3642804788663572) internal successors, (5584), 4131 states have internal predecessors, (5584), 651 states have call successors, (651), 433 states have call predecessors, (651), 451 states have return successors, (900), 634 states have call predecessors, (900), 648 states have call successors, (900) [2022-12-14 04:47:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 7135 transitions. [2022-12-14 04:47:12,393 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 7135 transitions. Word has length 124 [2022-12-14 04:47:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:12,393 INFO L495 AbstractCegarLoop]: Abstraction has 5197 states and 7135 transitions. [2022-12-14 04:47:12,393 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 7135 transitions. [2022-12-14 04:47:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 04:47:12,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:12,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:47:12,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 04:47:12,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 04:47:12,600 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2025214753, now seen corresponding path program 1 times [2022-12-14 04:47:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:12,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47561517] [2022-12-14 04:47:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:12,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:47:12,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:12,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47561517] [2022-12-14 04:47:12,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47561517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:12,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134237849] [2022-12-14 04:47:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:12,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:12,683 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:12,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 04:47:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:47:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:47:12,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:12,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134237849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:12,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:12,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 04:47:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625877580] [2022-12-14 04:47:12,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:47:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:47:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:12,792 INFO L87 Difference]: Start difference. First operand 5197 states and 7135 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:13,574 INFO L93 Difference]: Finished difference Result 9198 states and 12997 transitions. [2022-12-14 04:47:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:47:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2022-12-14 04:47:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:13,585 INFO L225 Difference]: With dead ends: 9198 [2022-12-14 04:47:13,585 INFO L226 Difference]: Without dead ends: 6908 [2022-12-14 04:47:13,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:13,589 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 89 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:13,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 477 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2022-12-14 04:47:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 5795. [2022-12-14 04:47:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 4635 states have (on average 1.397195253505933) internal successors, (6476), 4673 states have internal predecessors, (6476), 679 states have call successors, (679), 461 states have call predecessors, (679), 479 states have return successors, (928), 662 states have call predecessors, (928), 676 states have call successors, (928) [2022-12-14 04:47:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8083 transitions. [2022-12-14 04:47:14,250 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8083 transitions. Word has length 124 [2022-12-14 04:47:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:14,250 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8083 transitions. [2022-12-14 04:47:14,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8083 transitions. [2022-12-14 04:47:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 04:47:14,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:14,257 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, 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] [2022-12-14 04:47:14,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 04:47:14,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 04:47:14,458 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:14,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash -454428677, now seen corresponding path program 2 times [2022-12-14 04:47:14,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:14,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998524623] [2022-12-14 04:47:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 04:47:14,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998524623] [2022-12-14 04:47:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998524623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892350587] [2022-12-14 04:47:14,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:47:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:14,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:14,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 04:47:14,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 04:47:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:47:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:47:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:47:14,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892350587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:14,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:14,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 04:47:14,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519579561] [2022-12-14 04:47:14,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:14,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:47:14,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:47:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:47:14,706 INFO L87 Difference]: Start difference. First operand 5795 states and 8083 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:47:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:15,693 INFO L93 Difference]: Finished difference Result 10960 states and 15854 transitions. [2022-12-14 04:47:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:47:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-12-14 04:47:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:15,709 INFO L225 Difference]: With dead ends: 10960 [2022-12-14 04:47:15,709 INFO L226 Difference]: Without dead ends: 7957 [2022-12-14 04:47:15,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:47:15,718 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 111 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:15,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 487 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-12-14 04:47:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7809. [2022-12-14 04:47:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6286 states have (on average 1.4000954502068088) internal successors, (8801), 6332 states have internal predecessors, (8801), 897 states have call successors, (897), 607 states have call predecessors, (897), 624 states have return successors, (1341), 871 states have call predecessors, (1341), 894 states have call successors, (1341) [2022-12-14 04:47:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 11039 transitions. [2022-12-14 04:47:16,771 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 11039 transitions. Word has length 124 [2022-12-14 04:47:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:16,772 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 11039 transitions. [2022-12-14 04:47:16,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:47:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 11039 transitions. [2022-12-14 04:47:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 04:47:16,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:16,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:47:16,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 04:47:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 04:47:16,979 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1928584007, now seen corresponding path program 1 times [2022-12-14 04:47:16,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:16,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107930458] [2022-12-14 04:47:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:16,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 04:47:17,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107930458] [2022-12-14 04:47:17,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107930458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222663392] [2022-12-14 04:47:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:17,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:17,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:17,085 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:17,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 04:47:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:17,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:47:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:47:17,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:17,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222663392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:17,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:17,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 04:47:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698102082] [2022-12-14 04:47:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:47:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:47:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:17,203 INFO L87 Difference]: Start difference. First operand 7809 states and 11039 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:18,643 INFO L93 Difference]: Finished difference Result 13984 states and 20260 transitions. [2022-12-14 04:47:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:47:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-12-14 04:47:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:18,660 INFO L225 Difference]: With dead ends: 13984 [2022-12-14 04:47:18,660 INFO L226 Difference]: Without dead ends: 10352 [2022-12-14 04:47:18,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:18,667 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 83 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:18,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 472 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10352 states. [2022-12-14 04:47:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10352 to 8981. [2022-12-14 04:47:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8981 states, 7338 states have (on average 1.4313164349959118) internal successors, (10503), 7384 states have internal predecessors, (10503), 957 states have call successors, (957), 667 states have call predecessors, (957), 684 states have return successors, (1401), 931 states have call predecessors, (1401), 954 states have call successors, (1401) [2022-12-14 04:47:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 12861 transitions. [2022-12-14 04:47:19,636 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 12861 transitions. Word has length 121 [2022-12-14 04:47:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:19,636 INFO L495 AbstractCegarLoop]: Abstraction has 8981 states and 12861 transitions. [2022-12-14 04:47:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 12861 transitions. [2022-12-14 04:47:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 04:47:19,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:19,651 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, 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] [2022-12-14 04:47:19,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 04:47:19,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 04:47:19,852 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1686708194, now seen corresponding path program 1 times [2022-12-14 04:47:19,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:19,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794756234] [2022-12-14 04:47:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:19,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 04:47:19,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794756234] [2022-12-14 04:47:19,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794756234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52502867] [2022-12-14 04:47:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:19,960 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:19,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 04:47:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:47:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:47:20,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:20,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52502867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:20,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:20,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 04:47:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078278928] [2022-12-14 04:47:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:20,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:47:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:47:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:20,058 INFO L87 Difference]: Start difference. First operand 8981 states and 12861 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:21,428 INFO L93 Difference]: Finished difference Result 16132 states and 23682 transitions. [2022-12-14 04:47:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:47:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-12-14 04:47:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:21,448 INFO L225 Difference]: With dead ends: 16132 [2022-12-14 04:47:21,448 INFO L226 Difference]: Without dead ends: 11854 [2022-12-14 04:47:21,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:47:21,457 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 77 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:21,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 478 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:47:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2022-12-14 04:47:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 10679. [2022-12-14 04:47:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10679 states, 8856 states have (on average 1.4607046070460705) internal successors, (12936), 8902 states have internal predecessors, (12936), 1047 states have call successors, (1047), 757 states have call predecessors, (1047), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-12-14 04:47:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10679 states to 10679 states and 15474 transitions. [2022-12-14 04:47:22,588 INFO L78 Accepts]: Start accepts. Automaton has 10679 states and 15474 transitions. Word has length 121 [2022-12-14 04:47:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:22,588 INFO L495 AbstractCegarLoop]: Abstraction has 10679 states and 15474 transitions. [2022-12-14 04:47:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:47:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 10679 states and 15474 transitions. [2022-12-14 04:47:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 04:47:22,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:22,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:47:22,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 04:47:22,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:22,796 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash -233194406, now seen corresponding path program 2 times [2022-12-14 04:47:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:22,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190262988] [2022-12-14 04:47:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 04:47:22,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190262988] [2022-12-14 04:47:22,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190262988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664942993] [2022-12-14 04:47:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:47:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:22,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:22,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 04:47:23,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:47:23,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:47:23,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:47:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 04:47:23,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 04:47:23,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664942993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:47:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244337075] [2022-12-14 04:47:23,301 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-12-14 04:47:23,301 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:47:23,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:47:23,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:47:23,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:47:32,946 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 79 for LOIs [2022-12-14 04:47:32,950 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 144 for LOIs [2022-12-14 04:47:32,981 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-12-14 04:47:33,411 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-12-14 04:50:38,261 WARN L233 SmtUtils]: Spent 3.07m on a formula simplification that was a NOOP. DAG size: 1183 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 04:53:32,325 WARN L233 SmtUtils]: Spent 2.90m on a formula simplification that was a NOOP. DAG size: 1183 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 04:53:32,365 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 142 for LOIs [2022-12-14 04:53:32,390 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 124 for LOIs [2022-12-14 04:53:32,397 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 136 for LOIs [2022-12-14 04:53:32,706 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 134 for LOIs [2022-12-14 04:53:33,331 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 144 for LOIs [2022-12-14 04:53:33,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:10,503 WARN L233 SmtUtils]: Spent 26.19s on a formula simplification. DAG size of input: 1183 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:54:18,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '338437#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (<= ~t3_pc~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 04:54:18,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:54:18,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:18,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-12-14 04:54:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88390618] [2022-12-14 04:54:18,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 04:54:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 04:54:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 04:54:18,243 INFO L87 Difference]: Start difference. First operand 10679 states and 15474 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 04:54:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:22,414 INFO L93 Difference]: Finished difference Result 33417 states and 48395 transitions. [2022-12-14 04:54:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 04:54:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 121 [2022-12-14 04:54:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:22,458 INFO L225 Difference]: With dead ends: 33417 [2022-12-14 04:54:22,458 INFO L226 Difference]: Without dead ends: 23474 [2022-12-14 04:54:22,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 322 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3340 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=923, Invalid=6733, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 04:54:22,475 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1681 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:22,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 1138 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 04:54:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23474 states. [2022-12-14 04:54:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23474 to 21112. [2022-12-14 04:54:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21112 states, 17432 states have (on average 1.4187127122533272) internal successors, (24731), 17510 states have internal predecessors, (24731), 2144 states have call successors, (2144), 1478 states have call predecessors, (2144), 1534 states have return successors, (3037), 2125 states have call predecessors, (3037), 2141 states have call successors, (3037) [2022-12-14 04:54:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21112 states to 21112 states and 29912 transitions. [2022-12-14 04:54:24,960 INFO L78 Accepts]: Start accepts. Automaton has 21112 states and 29912 transitions. Word has length 121 [2022-12-14 04:54:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:24,960 INFO L495 AbstractCegarLoop]: Abstraction has 21112 states and 29912 transitions. [2022-12-14 04:54:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 04:54:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 21112 states and 29912 transitions. [2022-12-14 04:54:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 04:54:24,971 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:24,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:24,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 04:54:25,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:25,173 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1120901104, now seen corresponding path program 1 times [2022-12-14 04:54:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687686174] [2022-12-14 04:54:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 04:54:25,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:25,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687686174] [2022-12-14 04:54:25,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687686174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:25,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262119449] [2022-12-14 04:54:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:25,282 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:25,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 04:54:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 04:54:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:54:25,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:54:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262119449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:25,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:54:25,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 04:54:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880150897] [2022-12-14 04:54:25,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:25,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:54:25,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:54:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:54:25,388 INFO L87 Difference]: Start difference. First operand 21112 states and 29912 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 04:54:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:28,103 INFO L93 Difference]: Finished difference Result 30944 states and 43599 transitions. [2022-12-14 04:54:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:54:28,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 126 [2022-12-14 04:54:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:28,145 INFO L225 Difference]: With dead ends: 30944 [2022-12-14 04:54:28,145 INFO L226 Difference]: Without dead ends: 21747 [2022-12-14 04:54:28,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 04:54:28,161 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 222 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:28,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 669 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:54:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21747 states. [2022-12-14 04:54:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21747 to 21389. [2022-12-14 04:54:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21389 states, 17664 states have (on average 1.4160439311594204) internal successors, (25013), 17758 states have internal predecessors, (25013), 2152 states have call successors, (2152), 1483 states have call predecessors, (2152), 1571 states have return successors, (3093), 2149 states have call predecessors, (3093), 2149 states have call successors, (3093) [2022-12-14 04:54:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 30258 transitions. [2022-12-14 04:54:30,646 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 30258 transitions. Word has length 126 [2022-12-14 04:54:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:30,646 INFO L495 AbstractCegarLoop]: Abstraction has 21389 states and 30258 transitions. [2022-12-14 04:54:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 04:54:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 30258 transitions. [2022-12-14 04:54:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 04:54:30,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:30,659 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:54:30,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 04:54:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 04:54:30,860 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1380516629, now seen corresponding path program 1 times [2022-12-14 04:54:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:30,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272533839] [2022-12-14 04:54:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 04:54:30,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272533839] [2022-12-14 04:54:30,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272533839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357376486] [2022-12-14 04:54:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:30,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:30,998 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:30,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 04:54:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:54:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 04:54:31,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:54:31,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357376486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:31,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:54:31,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 04:54:31,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442977253] [2022-12-14 04:54:31,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:31,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:54:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:54:31,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:54:31,104 INFO L87 Difference]: Start difference. First operand 21389 states and 30258 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:54:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:33,702 INFO L93 Difference]: Finished difference Result 30654 states and 43380 transitions. [2022-12-14 04:54:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:54:33,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-12-14 04:54:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:33,740 INFO L225 Difference]: With dead ends: 30654 [2022-12-14 04:54:33,740 INFO L226 Difference]: Without dead ends: 21101 [2022-12-14 04:54:33,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:54:33,756 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 28 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:33,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 407 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:54:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21101 states. [2022-12-14 04:54:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21101 to 21101. [2022-12-14 04:54:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21101 states, 17408 states have (on average 1.4171070772058822) internal successors, (24669), 17494 states have internal predecessors, (24669), 2152 states have call successors, (2152), 1483 states have call predecessors, (2152), 1539 states have return successors, (3045), 2125 states have call predecessors, (3045), 2149 states have call successors, (3045) [2022-12-14 04:54:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21101 states to 21101 states and 29866 transitions. [2022-12-14 04:54:36,510 INFO L78 Accepts]: Start accepts. Automaton has 21101 states and 29866 transitions. Word has length 127 [2022-12-14 04:54:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:36,510 INFO L495 AbstractCegarLoop]: Abstraction has 21101 states and 29866 transitions. [2022-12-14 04:54:36,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:54:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 21101 states and 29866 transitions. [2022-12-14 04:54:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 04:54:36,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:36,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:54:36,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 04:54:36,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 04:54:36,729 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1789437372, now seen corresponding path program 1 times [2022-12-14 04:54:36,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:36,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679383107] [2022-12-14 04:54:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 04:54:36,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679383107] [2022-12-14 04:54:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679383107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326474212] [2022-12-14 04:54:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:36,905 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:36,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 04:54:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:54:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:54:37,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:54:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326474212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:37,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:54:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 04:54:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999856362] [2022-12-14 04:54:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:37,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:54:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:54:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:54:37,064 INFO L87 Difference]: Start difference. First operand 21101 states and 29866 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:54:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:40,808 INFO L93 Difference]: Finished difference Result 49289 states and 69945 transitions. [2022-12-14 04:54:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:54:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-12-14 04:54:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:40,860 INFO L225 Difference]: With dead ends: 49289 [2022-12-14 04:54:40,861 INFO L226 Difference]: Without dead ends: 28969 [2022-12-14 04:54:40,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 04:54:40,885 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 594 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:40,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 411 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:54:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28969 states. [2022-12-14 04:54:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28969 to 28965. [2022-12-14 04:54:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28965 states, 23789 states have (on average 1.3969061330867207) internal successors, (33231), 23911 states have internal predecessors, (33231), 3028 states have call successors, (3028), 2071 states have call predecessors, (3028), 2146 states have return successors, (4307), 2984 states have call predecessors, (4307), 3025 states have call successors, (4307) [2022-12-14 04:54:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28965 states to 28965 states and 40566 transitions. [2022-12-14 04:54:45,181 INFO L78 Accepts]: Start accepts. Automaton has 28965 states and 40566 transitions. Word has length 127 [2022-12-14 04:54:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:45,182 INFO L495 AbstractCegarLoop]: Abstraction has 28965 states and 40566 transitions. [2022-12-14 04:54:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:54:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28965 states and 40566 transitions. [2022-12-14 04:54:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 04:54:45,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:45,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:54:45,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 04:54:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 04:54:45,399 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 613284454, now seen corresponding path program 1 times [2022-12-14 04:54:45,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241587312] [2022-12-14 04:54:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:45,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 04:54:45,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241587312] [2022-12-14 04:54:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241587312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166247376] [2022-12-14 04:54:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:45,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:45,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:45,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 04:54:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:54:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 04:54:45,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:54:45,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166247376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:45,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:54:45,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 04:54:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754235045] [2022-12-14 04:54:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:45,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:54:45,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:54:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:54:45,672 INFO L87 Difference]: Start difference. First operand 28965 states and 40566 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:54:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:51,194 INFO L93 Difference]: Finished difference Result 68148 states and 95531 transitions. [2022-12-14 04:54:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:54:51,195 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), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-12-14 04:54:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:51,273 INFO L225 Difference]: With dead ends: 68148 [2022-12-14 04:54:51,273 INFO L226 Difference]: Without dead ends: 39964 [2022-12-14 04:54:51,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:54:51,310 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 453 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:51,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 465 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:54:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39964 states. [2022-12-14 04:54:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39964 to 39960. [2022-12-14 04:54:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39960 states, 32653 states have (on average 1.3757388295103052) internal successors, (44922), 32829 states have internal predecessors, (44922), 4287 states have call successors, (4287), 2915 states have call predecessors, (4287), 3018 states have return successors, (6117), 4217 states have call predecessors, (6117), 4284 states have call successors, (6117) [2022-12-14 04:54:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39960 states to 39960 states and 55326 transitions. [2022-12-14 04:54:57,192 INFO L78 Accepts]: Start accepts. Automaton has 39960 states and 55326 transitions. Word has length 129 [2022-12-14 04:54:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:57,193 INFO L495 AbstractCegarLoop]: Abstraction has 39960 states and 55326 transitions. [2022-12-14 04:54:57,193 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), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:54:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 39960 states and 55326 transitions. [2022-12-14 04:54:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 04:54:57,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:57,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:54:57,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 04:54:57,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 04:54:57,417 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash 885506138, now seen corresponding path program 1 times [2022-12-14 04:54:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:57,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296455853] [2022-12-14 04:54:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:57,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 04:54:57,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296455853] [2022-12-14 04:54:57,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296455853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897121522] [2022-12-14 04:54:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:57,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:57,537 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:57,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 04:54:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:57,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:54:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:54:57,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:54:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897121522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:54:57,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:54:57,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 04:54:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097074426] [2022-12-14 04:54:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:54:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:54:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:54:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:54:57,704 INFO L87 Difference]: Start difference. First operand 39960 states and 55326 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:55:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:06,390 INFO L93 Difference]: Finished difference Result 94672 states and 131111 transitions. [2022-12-14 04:55:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:55:06,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-12-14 04:55:06,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:06,516 INFO L225 Difference]: With dead ends: 94672 [2022-12-14 04:55:06,516 INFO L226 Difference]: Without dead ends: 55493 [2022-12-14 04:55:06,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:55:06,572 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 429 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:06,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 472 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:55:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55493 states. [2022-12-14 04:55:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55493 to 55489. [2022-12-14 04:55:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55489 states, 45122 states have (on average 1.3558352909888747) internal successors, (61178), 45379 states have internal predecessors, (61178), 6095 states have call successors, (6095), 4126 states have call predecessors, (6095), 4270 states have return successors, (8705), 5985 states have call predecessors, (8705), 6092 states have call successors, (8705) [2022-12-14 04:55:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55489 states to 55489 states and 75978 transitions. [2022-12-14 04:55:15,354 INFO L78 Accepts]: Start accepts. Automaton has 55489 states and 75978 transitions. Word has length 129 [2022-12-14 04:55:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:15,354 INFO L495 AbstractCegarLoop]: Abstraction has 55489 states and 75978 transitions. [2022-12-14 04:55:15,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 04:55:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 55489 states and 75978 transitions. [2022-12-14 04:55:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 04:55:15,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:15,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:55:15,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 04:55:15,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:15,585 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash 768663996, now seen corresponding path program 1 times [2022-12-14 04:55:15,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:15,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815885314] [2022-12-14 04:55:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:15,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 04:55:15,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815885314] [2022-12-14 04:55:15,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815885314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608140272] [2022-12-14 04:55:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:15,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:15,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:15,671 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:15,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 04:55:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 04:55:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:55:15,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:55:15,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608140272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:15,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:55:15,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 04:55:15,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288713094] [2022-12-14 04:55:15,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:55:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:55:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:55:15,798 INFO L87 Difference]: Start difference. First operand 55489 states and 75978 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:55:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:25,078 INFO L93 Difference]: Finished difference Result 105092 states and 146577 transitions. [2022-12-14 04:55:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:55:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-12-14 04:55:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:25,236 INFO L225 Difference]: With dead ends: 105092 [2022-12-14 04:55:25,236 INFO L226 Difference]: Without dead ends: 66660 [2022-12-14 04:55:25,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:55:25,300 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 186 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:25,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 252 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:55:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66660 states. [2022-12-14 04:55:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66660 to 65890. [2022-12-14 04:55:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65890 states, 54802 states have (on average 1.3337104485237765) internal successors, (73090), 55113 states have internal predecessors, (73090), 6196 states have call successors, (6196), 4687 states have call predecessors, (6196), 4890 states have return successors, (9958), 6091 states have call predecessors, (9958), 6193 states have call successors, (9958) [2022-12-14 04:55:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65890 states to 65890 states and 89244 transitions. [2022-12-14 04:55:34,562 INFO L78 Accepts]: Start accepts. Automaton has 65890 states and 89244 transitions. Word has length 131 [2022-12-14 04:55:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:34,563 INFO L495 AbstractCegarLoop]: Abstraction has 65890 states and 89244 transitions. [2022-12-14 04:55:34,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:55:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 65890 states and 89244 transitions. [2022-12-14 04:55:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 04:55:34,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:34,594 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:34,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 04:55:34,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 04:55:34,795 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 35442366, now seen corresponding path program 1 times [2022-12-14 04:55:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:34,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137570540] [2022-12-14 04:55:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 04:55:34,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137570540] [2022-12-14 04:55:34,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137570540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287329180] [2022-12-14 04:55:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:34,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:34,867 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:34,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 04:55:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:34,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:55:34,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:55:34,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:55:34,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287329180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:34,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:55:34,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 04:55:34,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004329844] [2022-12-14 04:55:34,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:34,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:55:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:55:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:55:34,979 INFO L87 Difference]: Start difference. First operand 65890 states and 89244 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:55:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:44,809 INFO L93 Difference]: Finished difference Result 111201 states and 155253 transitions. [2022-12-14 04:55:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:55:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-12-14 04:55:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:44,963 INFO L225 Difference]: With dead ends: 111201 [2022-12-14 04:55:44,963 INFO L226 Difference]: Without dead ends: 65705 [2022-12-14 04:55:45,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:55:45,035 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 111 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:45,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:55:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65705 states. [2022-12-14 04:55:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65705 to 65182. [2022-12-14 04:55:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65182 states, 54094 states have (on average 1.3096831441564685) internal successors, (70846), 54405 states have internal predecessors, (70846), 6196 states have call successors, (6196), 4687 states have call predecessors, (6196), 4890 states have return successors, (9958), 6091 states have call predecessors, (9958), 6193 states have call successors, (9958) [2022-12-14 04:55:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65182 states to 65182 states and 87000 transitions. [2022-12-14 04:55:54,840 INFO L78 Accepts]: Start accepts. Automaton has 65182 states and 87000 transitions. Word has length 131 [2022-12-14 04:55:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:54,840 INFO L495 AbstractCegarLoop]: Abstraction has 65182 states and 87000 transitions. [2022-12-14 04:55:54,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:55:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 65182 states and 87000 transitions. [2022-12-14 04:55:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 04:55:54,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:54,871 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:54,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 04:55:55,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 04:55:55,072 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 549973802, now seen corresponding path program 1 times [2022-12-14 04:55:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:55,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700070642] [2022-12-14 04:55:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 04:55:55,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700070642] [2022-12-14 04:55:55,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700070642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:55,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205603508] [2022-12-14 04:55:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:55,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:55,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:55,201 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:55,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 04:55:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:55:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:55:55,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:55:55,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205603508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:55:55,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:55:55,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 04:55:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571206281] [2022-12-14 04:55:55,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:55:55,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:55:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:55:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:55:55,441 INFO L87 Difference]: Start difference. First operand 65182 states and 87000 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 04:56:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:08,433 INFO L93 Difference]: Finished difference Result 127433 states and 171230 transitions. [2022-12-14 04:56:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 04:56:08,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 133 [2022-12-14 04:56:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:08,623 INFO L225 Difference]: With dead ends: 127433 [2022-12-14 04:56:08,623 INFO L226 Difference]: Without dead ends: 83868 [2022-12-14 04:56:08,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:56:08,688 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 266 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:08,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 647 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:56:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83868 states. [2022-12-14 04:56:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83868 to 80328. [2022-12-14 04:56:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80328 states, 66521 states have (on average 1.299995490145969) internal successors, (86477), 66760 states have internal predecessors, (86477), 7846 states have call successors, (7846), 5893 states have call predecessors, (7846), 5959 states have return successors, (12964), 7676 states have call predecessors, (12964), 7843 states have call successors, (12964) [2022-12-14 04:56:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80328 states to 80328 states and 107287 transitions. [2022-12-14 04:56:20,663 INFO L78 Accepts]: Start accepts. Automaton has 80328 states and 107287 transitions. Word has length 133 [2022-12-14 04:56:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:20,664 INFO L495 AbstractCegarLoop]: Abstraction has 80328 states and 107287 transitions. [2022-12-14 04:56:20,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 04:56:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 80328 states and 107287 transitions. [2022-12-14 04:56:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 04:56:20,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:20,695 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:56:20,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 04:56:20,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 04:56:20,896 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -459315154, now seen corresponding path program 1 times [2022-12-14 04:56:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27305195] [2022-12-14 04:56:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 04:56:20,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27305195] [2022-12-14 04:56:20,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27305195] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651281633] [2022-12-14 04:56:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:20,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:20,966 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:20,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 04:56:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:21,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:56:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:56:21,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:56:21,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651281633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:56:21,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:56:21,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 04:56:21,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231371924] [2022-12-14 04:56:21,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:56:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:56:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:56:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:56:21,091 INFO L87 Difference]: Start difference. First operand 80328 states and 107287 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:56:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:34,276 INFO L93 Difference]: Finished difference Result 135998 states and 188505 transitions. [2022-12-14 04:56:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:56:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-12-14 04:56:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:34,468 INFO L225 Difference]: With dead ends: 135998 [2022-12-14 04:56:34,468 INFO L226 Difference]: Without dead ends: 80536 [2022-12-14 04:56:34,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:56:34,627 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 113 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:34,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 469 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:56:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80536 states. [2022-12-14 04:56:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80536 to 80064. [2022-12-14 04:56:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80064 states, 66257 states have (on average 1.2736616508444392) internal successors, (84389), 66496 states have internal predecessors, (84389), 7846 states have call successors, (7846), 5893 states have call predecessors, (7846), 5959 states have return successors, (12964), 7676 states have call predecessors, (12964), 7843 states have call successors, (12964) [2022-12-14 04:56:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80064 states to 80064 states and 105199 transitions. [2022-12-14 04:56:47,490 INFO L78 Accepts]: Start accepts. Automaton has 80064 states and 105199 transitions. Word has length 131 [2022-12-14 04:56:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:47,490 INFO L495 AbstractCegarLoop]: Abstraction has 80064 states and 105199 transitions. [2022-12-14 04:56:47,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:56:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 80064 states and 105199 transitions. [2022-12-14 04:56:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 04:56:47,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:47,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 04:56:47,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 04:56:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 04:56:47,733 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:56:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 735227180, now seen corresponding path program 1 times [2022-12-14 04:56:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:56:47,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87965455] [2022-12-14 04:56:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:56:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 04:56:47,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87965455] [2022-12-14 04:56:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87965455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124766192] [2022-12-14 04:56:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:47,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:47,861 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:47,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 04:56:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:47,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 04:56:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 04:56:47,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:56:47,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124766192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:56:47,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:56:47,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 04:56:47,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419844109] [2022-12-14 04:56:47,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:56:47,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:56:47,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:56:47,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:56:47,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:56:47,999 INFO L87 Difference]: Start difference. First operand 80064 states and 105199 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:57:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:02,643 INFO L93 Difference]: Finished difference Result 145971 states and 196076 transitions. [2022-12-14 04:57:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:57:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-12-14 04:57:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:02,861 INFO L225 Difference]: With dead ends: 145971 [2022-12-14 04:57:02,861 INFO L226 Difference]: Without dead ends: 91929 [2022-12-14 04:57:02,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:57:02,952 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 191 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:02,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 256 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:57:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91929 states. [2022-12-14 04:57:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91929 to 89733. [2022-12-14 04:57:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89733 states, 75185 states have (on average 1.2562080202167987) internal successors, (94448), 75661 states have internal predecessors, (94448), 7918 states have call successors, (7918), 6313 states have call predecessors, (7918), 6628 states have return successors, (13995), 7760 states have call predecessors, (13995), 7915 states have call successors, (13995) [2022-12-14 04:57:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89733 states to 89733 states and 116361 transitions. [2022-12-14 04:57:17,109 INFO L78 Accepts]: Start accepts. Automaton has 89733 states and 116361 transitions. Word has length 131 [2022-12-14 04:57:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:17,109 INFO L495 AbstractCegarLoop]: Abstraction has 89733 states and 116361 transitions. [2022-12-14 04:57:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 04:57:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 89733 states and 116361 transitions. [2022-12-14 04:57:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 04:57:17,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:17,144 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:57:17,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 04:57:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:17,345 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:57:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 621391883, now seen corresponding path program 1 times [2022-12-14 04:57:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:57:17,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764698006] [2022-12-14 04:57:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:17,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:57:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 04:57:17,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:57:17,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764698006] [2022-12-14 04:57:17,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764698006] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:17,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147331829] [2022-12-14 04:57:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:17,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:17,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:17,451 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:17,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66f7f8ef-ee1f-4e4c-a574-18b8a5822f81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 04:57:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 04:57:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:57:17,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:57:17,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147331829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:57:17,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:57:17,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 04:57:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035463440] [2022-12-14 04:57:17,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:57:17,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:57:17,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:57:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:57:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:57:17,559 INFO L87 Difference]: Start difference. First operand 89733 states and 116361 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 04:57:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:35,238 INFO L93 Difference]: Finished difference Result 139667 states and 180277 transitions. [2022-12-14 04:57:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:57:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 128 [2022-12-14 04:57:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:35,568 INFO L225 Difference]: With dead ends: 139667 [2022-12-14 04:57:35,568 INFO L226 Difference]: Without dead ends: 99171 [2022-12-14 04:57:35,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:57:35,637 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 66 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:35,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 467 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:57:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99171 states.