./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu.cil.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_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/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_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/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_e2238888-e4c9-48a9-96db-a99bc3be62d2/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 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb --- 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 08:27:51,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:27:51,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:27:51,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:27:51,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:27:51,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:27:51,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:27:51,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:27:51,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:27:51,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:27:51,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:27:51,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:27:51,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:27:51,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:27:51,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:27:51,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:27:51,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:27:51,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:27:51,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:27:51,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:27:51,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:27:51,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:27:51,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:27:51,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:27:51,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:27:51,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:27:51,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:27:51,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:27:51,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:27:51,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:27:51,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:27:51,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:27:51,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:27:51,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:27:51,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:27:51,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:27:51,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:27:51,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:27:51,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:27:51,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:27:51,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:27:51,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:27:51,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:27:51,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:27:51,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:27:51,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:27:51,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:27:51,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:27:51,685 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:27:51,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:27:51,685 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:27:51,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:27:51,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:27:51,686 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:27:51,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:27:51,687 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:27:51,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:27:51,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:27:51,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:27:51,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:27:51,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:27:51,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:27:51,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:27:51,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:27:51,690 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_e2238888-e4c9-48a9-96db-a99bc3be62d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb [2022-12-14 08:27:51,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:27:51,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:27:51,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:27:51,875 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:27:51,876 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:27:51,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/kundu.cil.c [2022-12-14 08:27:54,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:27:54,546 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:27:54,546 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/sv-benchmarks/c/systemc/kundu.cil.c [2022-12-14 08:27:54,552 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/data/bd67a2f17/67b5752f91684ef3982b7abf6a688eb0/FLAG427a22f10 [2022-12-14 08:27:54,967 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/data/bd67a2f17/67b5752f91684ef3982b7abf6a688eb0 [2022-12-14 08:27:54,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:27:54,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:27:54,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:27:54,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:27:54,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:27:54,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:27:54" (1/1) ... [2022-12-14 08:27:54,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18137ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:54, skipping insertion in model container [2022-12-14 08:27:54,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:27:54" (1/1) ... [2022-12-14 08:27:54,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:27:54,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:27:55,092 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_e2238888-e4c9-48a9-96db-a99bc3be62d2/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2022-12-14 08:27:55,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:27:55,142 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:27:55,150 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_e2238888-e4c9-48a9-96db-a99bc3be62d2/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2022-12-14 08:27:55,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:27:55,181 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:27:55,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55 WrapperNode [2022-12-14 08:27:55,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:27:55,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:27:55,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:27:55,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:27:55,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,214 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 315 [2022-12-14 08:27:55,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:27:55,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:27:55,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:27:55,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:27:55,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:27:55,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:27:55,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:27:55,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:27:55,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (1/1) ... [2022-12-14 08:27:55,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:27:55,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:27:55,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:27:55,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:27:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:27:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-12-14 08:27:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-12-14 08:27:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 08:27:55,291 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 08:27:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 08:27:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 08:27:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 08:27:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 08:27:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 08:27:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 08:27:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 08:27:55,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 08:27:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:27:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 08:27:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 08:27:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:27:55,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:27:55,355 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:27:55,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:27:55,628 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:27:55,732 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:27:55,733 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 08:27:55,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:27:55 BoogieIcfgContainer [2022-12-14 08:27:55,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:27:55,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:27:55,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:27:55,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:27:55,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:27:54" (1/3) ... [2022-12-14 08:27:55,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9a5588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:27:55, skipping insertion in model container [2022-12-14 08:27:55,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:27:55" (2/3) ... [2022-12-14 08:27:55,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9a5588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:27:55, skipping insertion in model container [2022-12-14 08:27:55,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:27:55" (3/3) ... [2022-12-14 08:27:55,744 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2022-12-14 08:27:55,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:27:55,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:27:55,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:27:55,818 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;@30d7f69b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:27:55,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:27:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 08:27:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 08:27:55,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:55,830 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] [2022-12-14 08:27:55,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -679293870, now seen corresponding path program 1 times [2022-12-14 08:27:55,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:55,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400838186] [2022-12-14 08:27:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:55,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:56,109 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 08:27:56,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400838186] [2022-12-14 08:27:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400838186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:56,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:56,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:27:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864952667] [2022-12-14 08:27:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:27:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:27:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:27:56,148 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:27:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:56,356 INFO L93 Difference]: Finished difference Result 263 states and 391 transitions. [2022-12-14 08:27:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:27:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-12-14 08:27:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:56,365 INFO L225 Difference]: With dead ends: 263 [2022-12-14 08:27:56,365 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 08:27:56,368 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 08:27:56,370 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 225 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:56,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 348 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:27:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 08:27:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-12-14 08:27:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 127 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-14 08:27:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 231 transitions. [2022-12-14 08:27:56,411 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 231 transitions. Word has length 39 [2022-12-14 08:27:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:56,412 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 231 transitions. [2022-12-14 08:27:56,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:27:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 231 transitions. [2022-12-14 08:27:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 08:27:56,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:56,413 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] [2022-12-14 08:27:56,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:27:56,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1650968557, now seen corresponding path program 1 times [2022-12-14 08:27:56,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:56,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069635539] [2022-12-14 08:27:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:56,486 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 08:27:56,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069635539] [2022-12-14 08:27:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069635539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:56,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:56,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:27:56,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102125311] [2022-12-14 08:27:56,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:56,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:27:56,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:27:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:27:56,490 INFO L87 Difference]: Start difference. First operand 165 states and 231 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:27:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:56,847 INFO L93 Difference]: Finished difference Result 693 states and 969 transitions. [2022-12-14 08:27:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:27:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-12-14 08:27:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:56,857 INFO L225 Difference]: With dead ends: 693 [2022-12-14 08:27:56,857 INFO L226 Difference]: Without dead ends: 508 [2022-12-14 08:27:56,858 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 08:27:56,859 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 474 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:56,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 533 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:27:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-12-14 08:27:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 389. [2022-12-14 08:27:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 298 states have (on average 1.4261744966442953) internal successors, (425), 303 states have internal predecessors, (425), 60 states have call successors, (60), 30 states have call predecessors, (60), 30 states have return successors, (60), 56 states have call predecessors, (60), 57 states have call successors, (60) [2022-12-14 08:27:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 545 transitions. [2022-12-14 08:27:56,893 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 545 transitions. Word has length 39 [2022-12-14 08:27:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:56,893 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 545 transitions. [2022-12-14 08:27:56,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:27:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 545 transitions. [2022-12-14 08:27:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 08:27:56,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:56,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:27:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:27:56,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash 567263234, now seen corresponding path program 1 times [2022-12-14 08:27:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038086210] [2022-12-14 08:27:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:56,955 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 08:27:56,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:56,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038086210] [2022-12-14 08:27:56,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038086210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:56,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:56,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:27:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313370499] [2022-12-14 08:27:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:27:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:27:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:27:56,958 INFO L87 Difference]: Start difference. First operand 389 states and 545 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 08:27:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:57,092 INFO L93 Difference]: Finished difference Result 1011 states and 1419 transitions. [2022-12-14 08:27:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:27:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2022-12-14 08:27:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:57,095 INFO L225 Difference]: With dead ends: 1011 [2022-12-14 08:27:57,096 INFO L226 Difference]: Without dead ends: 628 [2022-12-14 08:27:57,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:27:57,098 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:57,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 445 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:27:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-12-14 08:27:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 607. [2022-12-14 08:27:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 463 states have (on average 1.4168466522678185) internal successors, (656), 476 states have internal predecessors, (656), 93 states have call successors, (93), 50 states have call predecessors, (93), 50 states have return successors, (93), 81 states have call predecessors, (93), 90 states have call successors, (93) [2022-12-14 08:27:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 842 transitions. [2022-12-14 08:27:57,141 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 842 transitions. Word has length 40 [2022-12-14 08:27:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:57,141 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 842 transitions. [2022-12-14 08:27:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 08:27:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 842 transitions. [2022-12-14 08:27:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:27:57,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:57,143 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] [2022-12-14 08:27:57,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:27:57,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1879382832, now seen corresponding path program 1 times [2022-12-14 08:27:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243169082] [2022-12-14 08:27:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:57,252 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 08:27:57,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243169082] [2022-12-14 08:27:57,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243169082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:57,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:57,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:27:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436332952] [2022-12-14 08:27:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:57,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:27:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:27:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:27:57,254 INFO L87 Difference]: Start difference. First operand 607 states and 842 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:27:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:57,519 INFO L93 Difference]: Finished difference Result 1710 states and 2394 transitions. [2022-12-14 08:27:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:27:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2022-12-14 08:27:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:57,525 INFO L225 Difference]: With dead ends: 1710 [2022-12-14 08:27:57,525 INFO L226 Difference]: Without dead ends: 1171 [2022-12-14 08:27:57,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:27:57,528 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 197 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:57,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 778 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:27:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-12-14 08:27:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1135. [2022-12-14 08:27:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 872 states have (on average 1.4094036697247707) internal successors, (1229), 895 states have internal predecessors, (1229), 168 states have call successors, (168), 93 states have call predecessors, (168), 94 states have return successors, (170), 147 states have call predecessors, (170), 165 states have call successors, (170) [2022-12-14 08:27:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1567 transitions. [2022-12-14 08:27:57,583 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1567 transitions. Word has length 50 [2022-12-14 08:27:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:57,583 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1567 transitions. [2022-12-14 08:27:57,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:27:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1567 transitions. [2022-12-14 08:27:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 08:27:57,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:57,584 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 08:27:57,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:27:57,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -780727868, now seen corresponding path program 1 times [2022-12-14 08:27:57,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094443764] [2022-12-14 08:27:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:57,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:57,692 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 08:27:57,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094443764] [2022-12-14 08:27:57,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094443764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:57,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:57,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:27:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79924803] [2022-12-14 08:27:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:27:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:27:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:27:57,695 INFO L87 Difference]: Start difference. First operand 1135 states and 1567 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 08:27:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:57,967 INFO L93 Difference]: Finished difference Result 3491 states and 4846 transitions. [2022-12-14 08:27:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:27:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-12-14 08:27:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:57,975 INFO L225 Difference]: With dead ends: 3491 [2022-12-14 08:27:57,976 INFO L226 Difference]: Without dead ends: 2362 [2022-12-14 08:27:57,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:27:57,979 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 336 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:57,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 251 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:27:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-12-14 08:27:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2065. [2022-12-14 08:27:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1597 states have (on average 1.3994990607388853) internal successors, (2235), 1621 states have internal predecessors, (2235), 291 states have call successors, (291), 173 states have call predecessors, (291), 176 states have return successors, (297), 271 states have call predecessors, (297), 288 states have call successors, (297) [2022-12-14 08:27:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2823 transitions. [2022-12-14 08:27:58,076 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2823 transitions. Word has length 53 [2022-12-14 08:27:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:58,076 INFO L495 AbstractCegarLoop]: Abstraction has 2065 states and 2823 transitions. [2022-12-14 08:27:58,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 08:27:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2823 transitions. [2022-12-14 08:27:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 08:27:58,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:58,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:27:58,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:27:58,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:58,078 INFO L85 PathProgramCache]: Analyzing trace with hash -939789985, now seen corresponding path program 1 times [2022-12-14 08:27:58,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:58,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263282224] [2022-12-14 08:27:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:58,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:58,104 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 08:27:58,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:58,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263282224] [2022-12-14 08:27:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263282224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:58,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:58,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:27:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919129445] [2022-12-14 08:27:58,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:27:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:27:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:27:58,106 INFO L87 Difference]: Start difference. First operand 2065 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:27:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:58,279 INFO L93 Difference]: Finished difference Result 4741 states and 6485 transitions. [2022-12-14 08:27:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:27:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 54 [2022-12-14 08:27:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:58,297 INFO L225 Difference]: With dead ends: 4741 [2022-12-14 08:27:58,297 INFO L226 Difference]: Without dead ends: 2681 [2022-12-14 08:27:58,300 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 08:27:58,300 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 93 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:58,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 212 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:27:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2022-12-14 08:27:58,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2242. [2022-12-14 08:27:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1689 states have (on average 1.3457667258732977) internal successors, (2273), 1717 states have internal predecessors, (2273), 346 states have call successors, (346), 207 states have call predecessors, (346), 206 states have return successors, (343), 318 states have call predecessors, (343), 343 states have call successors, (343) [2022-12-14 08:27:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 2962 transitions. [2022-12-14 08:27:58,408 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 2962 transitions. Word has length 54 [2022-12-14 08:27:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:58,408 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 2962 transitions. [2022-12-14 08:27:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:27:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 2962 transitions. [2022-12-14 08:27:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 08:27:58,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:58,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:27:58,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:27:58,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2108003415, now seen corresponding path program 1 times [2022-12-14 08:27:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:58,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510726197] [2022-12-14 08:27:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:58,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:58,480 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 08:27:58,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510726197] [2022-12-14 08:27:58,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510726197] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:58,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:58,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:27:58,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814661355] [2022-12-14 08:27:58,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:58,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:27:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:27:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:27:58,482 INFO L87 Difference]: Start difference. First operand 2242 states and 2962 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:27:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:27:59,037 INFO L93 Difference]: Finished difference Result 6180 states and 8394 transitions. [2022-12-14 08:27:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:27:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-12-14 08:27:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:27:59,049 INFO L225 Difference]: With dead ends: 6180 [2022-12-14 08:27:59,049 INFO L226 Difference]: Without dead ends: 4169 [2022-12-14 08:27:59,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:27:59,054 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 400 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:27:59,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 624 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:27:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2022-12-14 08:27:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3198. [2022-12-14 08:27:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2417 states have (on average 1.3475382705833678) internal successors, (3257), 2447 states have internal predecessors, (3257), 488 states have call successors, (488), 293 states have call predecessors, (488), 292 states have return successors, (485), 458 states have call predecessors, (485), 485 states have call successors, (485) [2022-12-14 08:27:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4230 transitions. [2022-12-14 08:27:59,276 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4230 transitions. Word has length 55 [2022-12-14 08:27:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:27:59,276 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 4230 transitions. [2022-12-14 08:27:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:27:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4230 transitions. [2022-12-14 08:27:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 08:27:59,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:27:59,277 INFO L195 NwaCegarLoop]: trace histogram [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 08:27:59,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:27:59,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:27:59,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:27:59,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1593839665, now seen corresponding path program 1 times [2022-12-14 08:27:59,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:27:59,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006935402] [2022-12-14 08:27:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:27:59,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:27:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:27:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:27:59,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:27:59,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006935402] [2022-12-14 08:27:59,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006935402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:27:59,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:27:59,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:27:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354200126] [2022-12-14 08:27:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:27:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:27:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:27:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:27:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:27:59,362 INFO L87 Difference]: Start difference. First operand 3198 states and 4230 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:28:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:00,061 INFO L93 Difference]: Finished difference Result 9896 states and 13111 transitions. [2022-12-14 08:28:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:28:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2022-12-14 08:28:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:00,081 INFO L225 Difference]: With dead ends: 9896 [2022-12-14 08:28:00,081 INFO L226 Difference]: Without dead ends: 6704 [2022-12-14 08:28:00,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:28:00,088 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 362 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:00,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 261 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2022-12-14 08:28:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 6126. [2022-12-14 08:28:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 4617 states have (on average 1.327485380116959) internal successors, (6129), 4655 states have internal predecessors, (6129), 936 states have call successors, (936), 573 states have call predecessors, (936), 572 states have return successors, (933), 898 states have call predecessors, (933), 933 states have call successors, (933) [2022-12-14 08:28:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 7998 transitions. [2022-12-14 08:28:00,436 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 7998 transitions. Word has length 57 [2022-12-14 08:28:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:00,436 INFO L495 AbstractCegarLoop]: Abstraction has 6126 states and 7998 transitions. [2022-12-14 08:28:00,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:28:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 7998 transitions. [2022-12-14 08:28:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 08:28:00,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:00,438 INFO L195 NwaCegarLoop]: trace histogram [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 08:28:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:28:00,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -981896383, now seen corresponding path program 1 times [2022-12-14 08:28:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:00,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074888219] [2022-12-14 08:28:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:28:00,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074888219] [2022-12-14 08:28:00,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074888219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:00,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:00,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:28:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324169587] [2022-12-14 08:28:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:00,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:28:00,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:28:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:28:00,482 INFO L87 Difference]: Start difference. First operand 6126 states and 7998 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:28:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:01,532 INFO L93 Difference]: Finished difference Result 20396 states and 27116 transitions. [2022-12-14 08:28:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:28:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2022-12-14 08:28:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:01,577 INFO L225 Difference]: With dead ends: 20396 [2022-12-14 08:28:01,577 INFO L226 Difference]: Without dead ends: 14276 [2022-12-14 08:28:01,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:28:01,591 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 470 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:01,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 493 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2022-12-14 08:28:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 10725. [2022-12-14 08:28:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 8171 states have (on average 1.3402276343164852) internal successors, (10951), 8265 states have internal predecessors, (10951), 1543 states have call successors, (1543), 1011 states have call predecessors, (1543), 1010 states have return successors, (1632), 1449 states have call predecessors, (1632), 1540 states have call successors, (1632) [2022-12-14 08:28:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 14126 transitions. [2022-12-14 08:28:02,328 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 14126 transitions. Word has length 59 [2022-12-14 08:28:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:02,329 INFO L495 AbstractCegarLoop]: Abstraction has 10725 states and 14126 transitions. [2022-12-14 08:28:02,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:28:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 14126 transitions. [2022-12-14 08:28:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 08:28:02,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:02,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:28:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:28:02,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -683441854, now seen corresponding path program 1 times [2022-12-14 08:28:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716041469] [2022-12-14 08:28:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:28:02,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:02,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716041469] [2022-12-14 08:28:02,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716041469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:02,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:02,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:28:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818080059] [2022-12-14 08:28:02,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:02,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:28:02,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:28:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:28:02,383 INFO L87 Difference]: Start difference. First operand 10725 states and 14126 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 08:28:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:03,551 INFO L93 Difference]: Finished difference Result 25885 states and 34123 transitions. [2022-12-14 08:28:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:28:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 63 [2022-12-14 08:28:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:03,611 INFO L225 Difference]: With dead ends: 25885 [2022-12-14 08:28:03,611 INFO L226 Difference]: Without dead ends: 15708 [2022-12-14 08:28:03,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:28:03,637 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 284 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:03,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 576 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15708 states. [2022-12-14 08:28:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15708 to 15433. [2022-12-14 08:28:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15433 states, 11779 states have (on average 1.3395874013074114) internal successors, (15779), 11883 states have internal predecessors, (15779), 2209 states have call successors, (2209), 1445 states have call predecessors, (2209), 1444 states have return successors, (2334), 2105 states have call predecessors, (2334), 2206 states have call successors, (2334) [2022-12-14 08:28:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15433 states to 15433 states and 20322 transitions. [2022-12-14 08:28:04,618 INFO L78 Accepts]: Start accepts. Automaton has 15433 states and 20322 transitions. Word has length 63 [2022-12-14 08:28:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:04,618 INFO L495 AbstractCegarLoop]: Abstraction has 15433 states and 20322 transitions. [2022-12-14 08:28:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 08:28:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 15433 states and 20322 transitions. [2022-12-14 08:28:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 08:28:04,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:04,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:28:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:28:04,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1991503280, now seen corresponding path program 1 times [2022-12-14 08:28:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:04,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824297357] [2022-12-14 08:28:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:28:04,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824297357] [2022-12-14 08:28:04,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824297357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:04,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:04,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:28:04,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242887786] [2022-12-14 08:28:04,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:04,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:28:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:28:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:28:04,721 INFO L87 Difference]: Start difference. First operand 15433 states and 20322 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 08:28:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:07,189 INFO L93 Difference]: Finished difference Result 48675 states and 66346 transitions. [2022-12-14 08:28:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:28:07,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 66 [2022-12-14 08:28:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:07,264 INFO L225 Difference]: With dead ends: 48675 [2022-12-14 08:28:07,265 INFO L226 Difference]: Without dead ends: 33790 [2022-12-14 08:28:07,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:28:07,285 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 442 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:07,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1395 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:28:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33790 states. [2022-12-14 08:28:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33790 to 24281. [2022-12-14 08:28:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24281 states, 18575 states have (on average 1.3428263795423956) internal successors, (24943), 18697 states have internal predecessors, (24943), 3451 states have call successors, (3451), 2255 states have call predecessors, (3451), 2254 states have return successors, (3668), 3329 states have call predecessors, (3668), 3448 states have call successors, (3668) [2022-12-14 08:28:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24281 states to 24281 states and 32062 transitions. [2022-12-14 08:28:08,748 INFO L78 Accepts]: Start accepts. Automaton has 24281 states and 32062 transitions. Word has length 66 [2022-12-14 08:28:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:08,749 INFO L495 AbstractCegarLoop]: Abstraction has 24281 states and 32062 transitions. [2022-12-14 08:28:08,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 08:28:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 24281 states and 32062 transitions. [2022-12-14 08:28:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 08:28:08,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:08,752 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:28:08,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:28:08,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 640347949, now seen corresponding path program 1 times [2022-12-14 08:28:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839385198] [2022-12-14 08:28:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:28:08,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:08,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839385198] [2022-12-14 08:28:08,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839385198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:08,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:08,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:28:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107811642] [2022-12-14 08:28:08,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:28:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:28:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:28:08,796 INFO L87 Difference]: Start difference. First operand 24281 states and 32062 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:28:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:11,138 INFO L93 Difference]: Finished difference Result 53779 states and 70488 transitions. [2022-12-14 08:28:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:28:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-12-14 08:28:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:11,200 INFO L225 Difference]: With dead ends: 53779 [2022-12-14 08:28:11,200 INFO L226 Difference]: Without dead ends: 29504 [2022-12-14 08:28:11,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:28:11,234 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 477 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:11,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 501 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29504 states. [2022-12-14 08:28:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29504 to 26293. [2022-12-14 08:28:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26293 states, 20143 states have (on average 1.3327210445315991) internal successors, (26845), 20265 states have internal predecessors, (26845), 3673 states have call successors, (3673), 2477 states have call predecessors, (3673), 2476 states have return successors, (3890), 3551 states have call predecessors, (3890), 3670 states have call successors, (3890) [2022-12-14 08:28:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26293 states to 26293 states and 34408 transitions. [2022-12-14 08:28:12,815 INFO L78 Accepts]: Start accepts. Automaton has 26293 states and 34408 transitions. Word has length 69 [2022-12-14 08:28:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 26293 states and 34408 transitions. [2022-12-14 08:28:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:28:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26293 states and 34408 transitions. [2022-12-14 08:28:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 08:28:12,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:12,818 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, 1, 1, 1, 1, 1, 1] [2022-12-14 08:28:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:28:12,818 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash -21606109, now seen corresponding path program 1 times [2022-12-14 08:28:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895343638] [2022-12-14 08:28:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:12,866 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 08:28:12,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:12,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895343638] [2022-12-14 08:28:12,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895343638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:12,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:12,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:28:12,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243106536] [2022-12-14 08:28:12,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:12,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:28:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:28:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:28:12,868 INFO L87 Difference]: Start difference. First operand 26293 states and 34408 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:28:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:15,163 INFO L93 Difference]: Finished difference Result 61024 states and 80776 transitions. [2022-12-14 08:28:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:28:15,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-12-14 08:28:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:15,236 INFO L225 Difference]: With dead ends: 61024 [2022-12-14 08:28:15,236 INFO L226 Difference]: Without dead ends: 35299 [2022-12-14 08:28:15,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:28:15,271 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 189 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:15,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 685 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35299 states. [2022-12-14 08:28:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35299 to 31717. [2022-12-14 08:28:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31717 states, 24187 states have (on average 1.3237276222764296) internal successors, (32017), 24435 states have internal predecessors, (32017), 4489 states have call successors, (4489), 3041 states have call predecessors, (4489), 3040 states have return successors, (4754), 4241 states have call predecessors, (4754), 4486 states have call successors, (4754) [2022-12-14 08:28:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31717 states to 31717 states and 41260 transitions. [2022-12-14 08:28:17,751 INFO L78 Accepts]: Start accepts. Automaton has 31717 states and 41260 transitions. Word has length 70 [2022-12-14 08:28:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:17,751 INFO L495 AbstractCegarLoop]: Abstraction has 31717 states and 41260 transitions. [2022-12-14 08:28:17,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:28:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31717 states and 41260 transitions. [2022-12-14 08:28:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 08:28:17,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:17,754 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 08:28:17,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 08:28:17,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:17,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2076809289, now seen corresponding path program 1 times [2022-12-14 08:28:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:17,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926971206] [2022-12-14 08:28:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:28:17,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:17,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926971206] [2022-12-14 08:28:17,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926971206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:17,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:17,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:28:17,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722493083] [2022-12-14 08:28:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:28:17,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:28:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:28:17,828 INFO L87 Difference]: Start difference. First operand 31717 states and 41260 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:28:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:21,414 INFO L93 Difference]: Finished difference Result 85467 states and 111671 transitions. [2022-12-14 08:28:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:28:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2022-12-14 08:28:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:21,526 INFO L225 Difference]: With dead ends: 85467 [2022-12-14 08:28:21,526 INFO L226 Difference]: Without dead ends: 53756 [2022-12-14 08:28:21,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:28:21,570 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 263 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:21,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 278 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53756 states. [2022-12-14 08:28:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53756 to 52721. [2022-12-14 08:28:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52721 states, 39454 states have (on average 1.2966492624321995) internal successors, (51158), 39823 states have internal predecessors, (51158), 8041 states have call successors, (8041), 5226 states have call predecessors, (8041), 5225 states have return successors, (8574), 7672 states have call predecessors, (8574), 8038 states have call successors, (8574) [2022-12-14 08:28:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52721 states to 52721 states and 67773 transitions. [2022-12-14 08:28:25,507 INFO L78 Accepts]: Start accepts. Automaton has 52721 states and 67773 transitions. Word has length 71 [2022-12-14 08:28:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:25,508 INFO L495 AbstractCegarLoop]: Abstraction has 52721 states and 67773 transitions. [2022-12-14 08:28:25,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:28:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 52721 states and 67773 transitions. [2022-12-14 08:28:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 08:28:25,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:25,511 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, 1] [2022-12-14 08:28:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 08:28:25,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 676125634, now seen corresponding path program 1 times [2022-12-14 08:28:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:25,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94839350] [2022-12-14 08:28:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:28:25,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94839350] [2022-12-14 08:28:25,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94839350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:25,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:25,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:28:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58391502] [2022-12-14 08:28:25,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:25,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:28:25,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:28:25,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:28:25,549 INFO L87 Difference]: Start difference. First operand 52721 states and 67773 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:28:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:30,153 INFO L93 Difference]: Finished difference Result 115886 states and 148338 transitions. [2022-12-14 08:28:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:28:30,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2022-12-14 08:28:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:30,312 INFO L225 Difference]: With dead ends: 115886 [2022-12-14 08:28:30,313 INFO L226 Difference]: Without dead ends: 63171 [2022-12-14 08:28:30,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:28:30,388 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 434 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:30,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 522 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:28:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63171 states. [2022-12-14 08:28:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63171 to 54607. [2022-12-14 08:28:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54607 states, 40973 states have (on average 1.2918019183364655) internal successors, (52929), 41318 states have internal predecessors, (52929), 8187 states have call successors, (8187), 5447 states have call predecessors, (8187), 5446 states have return successors, (8720), 7842 states have call predecessors, (8720), 8184 states have call successors, (8720) [2022-12-14 08:28:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54607 states to 54607 states and 69836 transitions. [2022-12-14 08:28:34,513 INFO L78 Accepts]: Start accepts. Automaton has 54607 states and 69836 transitions. Word has length 72 [2022-12-14 08:28:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:34,514 INFO L495 AbstractCegarLoop]: Abstraction has 54607 states and 69836 transitions. [2022-12-14 08:28:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:28:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 54607 states and 69836 transitions. [2022-12-14 08:28:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 08:28:34,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:34,518 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 08:28:34,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:28:34,518 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 771153768, now seen corresponding path program 1 times [2022-12-14 08:28:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615819795] [2022-12-14 08:28:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 08:28:34,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615819795] [2022-12-14 08:28:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615819795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:34,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:28:34,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:28:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602166538] [2022-12-14 08:28:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:28:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:28:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:28:34,553 INFO L87 Difference]: Start difference. First operand 54607 states and 69836 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:28:40,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:40,045 INFO L93 Difference]: Finished difference Result 134637 states and 172186 transitions. [2022-12-14 08:28:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:28:40,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-12-14 08:28:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:40,216 INFO L225 Difference]: With dead ends: 134637 [2022-12-14 08:28:40,216 INFO L226 Difference]: Without dead ends: 81020 [2022-12-14 08:28:40,286 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 08:28:40,287 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 101 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:40,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 215 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:28:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81020 states. [2022-12-14 08:28:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81020 to 81007. [2022-12-14 08:28:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81007 states, 60739 states have (on average 1.2895339073741747) internal successors, (78325), 61270 states have internal predecessors, (78325), 12106 states have call successors, (12106), 8162 states have call predecessors, (12106), 8161 states have return successors, (12871), 11575 states have call predecessors, (12871), 12103 states have call successors, (12871) [2022-12-14 08:28:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81007 states to 81007 states and 103302 transitions. [2022-12-14 08:28:46,051 INFO L78 Accepts]: Start accepts. Automaton has 81007 states and 103302 transitions. Word has length 85 [2022-12-14 08:28:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:28:46,051 INFO L495 AbstractCegarLoop]: Abstraction has 81007 states and 103302 transitions. [2022-12-14 08:28:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:28:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 81007 states and 103302 transitions. [2022-12-14 08:28:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:28:46,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:28:46,058 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:28:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 08:28:46,059 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:28:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:28:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash -488355775, now seen corresponding path program 1 times [2022-12-14 08:28:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:28:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668049504] [2022-12-14 08:28:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:46,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:28:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:28:46,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:28:46,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668049504] [2022-12-14 08:28:46,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668049504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:28:46,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080665273] [2022-12-14 08:28:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:28:46,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:28:46,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:28:46,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:28:46,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:28:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:28:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:28:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:28:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:28:46,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:28:46,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080665273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:28:46,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:28:46,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2022-12-14 08:28:46,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567554593] [2022-12-14 08:28:46,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:28:46,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:28:46,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:28:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:28:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:28:46,446 INFO L87 Difference]: Start difference. First operand 81007 states and 103302 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 08:28:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:28:57,334 INFO L93 Difference]: Finished difference Result 239905 states and 307466 transitions. [2022-12-14 08:28:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:28:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 100 [2022-12-14 08:28:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:28:57,694 INFO L225 Difference]: With dead ends: 239905 [2022-12-14 08:28:57,694 INFO L226 Difference]: Without dead ends: 159920 [2022-12-14 08:28:57,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:28:57,811 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 70 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:28:57,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 220 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:28:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159920 states. [2022-12-14 08:29:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159920 to 159441. [2022-12-14 08:29:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159441 states, 119539 states have (on average 1.2863082341327934) internal successors, (153764), 120598 states have internal predecessors, (153764), 23799 states have call successors, (23799), 16103 states have call predecessors, (23799), 16102 states have return successors, (25300), 22740 states have call predecessors, (25300), 23796 states have call successors, (25300) [2022-12-14 08:29:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159441 states to 159441 states and 202863 transitions. [2022-12-14 08:29:09,357 INFO L78 Accepts]: Start accepts. Automaton has 159441 states and 202863 transitions. Word has length 100 [2022-12-14 08:29:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:29:09,358 INFO L495 AbstractCegarLoop]: Abstraction has 159441 states and 202863 transitions. [2022-12-14 08:29:09,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 08:29:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 159441 states and 202863 transitions. [2022-12-14 08:29:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 08:29:09,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:29:09,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:29:09,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:29:09,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:29:09,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:29:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:29:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1637246767, now seen corresponding path program 1 times [2022-12-14 08:29:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:29:09,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378240069] [2022-12-14 08:29:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:29:09,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:29:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:29:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:29:09,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:29:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378240069] [2022-12-14 08:29:09,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378240069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:29:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202403694] [2022-12-14 08:29:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:29:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:29:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:29:09,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:29:09,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:29:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:29:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:29:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:29:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:29:09,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:29:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202403694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:29:09,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:29:09,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 08:29:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607659200] [2022-12-14 08:29:09,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:29:09,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:29:09,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:29:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:29:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:29:09,757 INFO L87 Difference]: Start difference. First operand 159441 states and 202863 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:29:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:29:30,230 INFO L93 Difference]: Finished difference Result 419382 states and 534244 transitions. [2022-12-14 08:29:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:29:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 99 [2022-12-14 08:29:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:29:31,029 INFO L225 Difference]: With dead ends: 419382 [2022-12-14 08:29:31,029 INFO L226 Difference]: Without dead ends: 314124 [2022-12-14 08:29:31,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:29:31,216 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 60 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:29:31,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:29:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314124 states. [2022-12-14 08:29:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314124 to 314119. [2022-12-14 08:29:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314119 states, 236699 states have (on average 1.282696589339203) internal successors, (303613), 238814 states have internal predecessors, (303613), 45215 states have call successors, (45215), 32205 states have call predecessors, (45215), 32204 states have return successors, (47484), 43100 states have call predecessors, (47484), 45212 states have call successors, (47484) [2022-12-14 08:29:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314119 states to 314119 states and 396312 transitions. [2022-12-14 08:29:55,154 INFO L78 Accepts]: Start accepts. Automaton has 314119 states and 396312 transitions. Word has length 99 [2022-12-14 08:29:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:29:55,154 INFO L495 AbstractCegarLoop]: Abstraction has 314119 states and 396312 transitions. [2022-12-14 08:29:55,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:29:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 314119 states and 396312 transitions. [2022-12-14 08:29:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:29:55,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:29:55,160 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-12-14 08:29:55,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:29:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:29:55,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:29:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:29:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash -243110056, now seen corresponding path program 1 times [2022-12-14 08:29:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:29:55,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694646824] [2022-12-14 08:29:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:29:55,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:29:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:29:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:29:55,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:29:55,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694646824] [2022-12-14 08:29:55,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694646824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:29:55,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942735778] [2022-12-14 08:29:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:29:55,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:29:55,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:29:55,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:29:55,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:29:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:29:55,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:29:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:29:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:29:55,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:29:55,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942735778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:29:55,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:29:55,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-12-14 08:29:55,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408193086] [2022-12-14 08:29:55,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:29:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:29:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:29:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:29:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:29:55,634 INFO L87 Difference]: Start difference. First operand 314119 states and 396312 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 08:30:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:30:25,796 INFO L93 Difference]: Finished difference Result 714655 states and 908152 transitions. [2022-12-14 08:30:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:30:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 101 [2022-12-14 08:30:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:30:26,899 INFO L225 Difference]: With dead ends: 714655 [2022-12-14 08:30:26,899 INFO L226 Difference]: Without dead ends: 401610 [2022-12-14 08:30:27,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:30:27,419 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:30:27,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 281 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:30:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401610 states. [2022-12-14 08:30:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401610 to 398513. [2022-12-14 08:30:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398513 states, 299385 states have (on average 1.273286904821551) internal successors, (381203), 302006 states have internal predecessors, (381203), 57893 states have call successors, (57893), 41235 states have call predecessors, (57893), 41234 states have return successors, (64706), 55272 states have call predecessors, (64706), 57890 states have call successors, (64706) [2022-12-14 08:30:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398513 states to 398513 states and 503802 transitions. [2022-12-14 08:30:58,321 INFO L78 Accepts]: Start accepts. Automaton has 398513 states and 503802 transitions. Word has length 101 [2022-12-14 08:30:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:30:58,322 INFO L495 AbstractCegarLoop]: Abstraction has 398513 states and 503802 transitions. [2022-12-14 08:30:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 08:30:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 398513 states and 503802 transitions. [2022-12-14 08:30:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:30:58,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:58,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:58,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:30:58,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:58,529 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2074860093, now seen corresponding path program 1 times [2022-12-14 08:30:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:58,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993200213] [2022-12-14 08:30:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:58,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:30:58,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:30:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993200213] [2022-12-14 08:30:58,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993200213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:30:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969395950] [2022-12-14 08:30:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:58,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:58,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:30:58,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:30:58,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:30:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:30:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:30:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:30:58,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:30:58,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969395950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:30:58,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:30:58,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-12-14 08:30:58,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960879652] [2022-12-14 08:30:58,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:30:58,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:30:58,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:30:58,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:30:58,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:30:58,718 INFO L87 Difference]: Start difference. First operand 398513 states and 503802 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:31:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:31:37,569 INFO L93 Difference]: Finished difference Result 915927 states and 1165111 transitions. [2022-12-14 08:31:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:31:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-12-14 08:31:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:31:39,228 INFO L225 Difference]: With dead ends: 915927 [2022-12-14 08:31:39,229 INFO L226 Difference]: Without dead ends: 520560 [2022-12-14 08:31:39,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:31:39,741 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 90 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:31:39,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 441 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:31:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520560 states. [2022-12-14 08:32:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520560 to 509469. [2022-12-14 08:32:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509469 states, 378740 states have (on average 1.2685905898505572) internal successors, (480466), 383181 states have internal predecessors, (480466), 75986 states have call successors, (75986), 53599 states have call predecessors, (75986), 54742 states have return successors, (92119), 72689 states have call predecessors, (92119), 75983 states have call successors, (92119) [2022-12-14 08:32:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509469 states to 509469 states and 648571 transitions. [2022-12-14 08:32:21,569 INFO L78 Accepts]: Start accepts. Automaton has 509469 states and 648571 transitions. Word has length 100 [2022-12-14 08:32:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:32:21,570 INFO L495 AbstractCegarLoop]: Abstraction has 509469 states and 648571 transitions. [2022-12-14 08:32:21,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:32:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 509469 states and 648571 transitions. [2022-12-14 08:32:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:32:21,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:32:21,576 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:32:21,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 08:32:21,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:32:21,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:32:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:32:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1325998173, now seen corresponding path program 1 times [2022-12-14 08:32:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:32:21,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006086052] [2022-12-14 08:32:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:32:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:32:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:32:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:32:21,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:32:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006086052] [2022-12-14 08:32:21,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006086052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:32:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935062630] [2022-12-14 08:32:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:32:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:32:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:32:21,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:32:21,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:32:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:32:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:32:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:32:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:32:22,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:32:22,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935062630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:32:22,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:32:22,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2022-12-14 08:32:22,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759389930] [2022-12-14 08:32:22,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:32:22,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:32:22,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:32:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:32:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:32:22,056 INFO L87 Difference]: Start difference. First operand 509469 states and 648571 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 08:32:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:32:54,061 INFO L93 Difference]: Finished difference Result 916871 states and 1181598 transitions. [2022-12-14 08:32:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:32:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 102 [2022-12-14 08:32:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:32:55,207 INFO L225 Difference]: With dead ends: 916871 [2022-12-14 08:32:55,207 INFO L226 Difference]: Without dead ends: 407544 [2022-12-14 08:32:55,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:32:55,959 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 354 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:32:55,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1169 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:32:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407544 states. [2022-12-14 08:33:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407544 to 340377. [2022-12-14 08:33:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340377 states, 260621 states have (on average 1.2957474647092906) internal successors, (337699), 264526 states have internal predecessors, (337699), 45458 states have call successors, (45458), 33690 states have call predecessors, (45458), 34297 states have return successors, (53803), 42161 states have call predecessors, (53803), 45455 states have call successors, (53803) [2022-12-14 08:33:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340377 states to 340377 states and 436960 transitions. [2022-12-14 08:33:25,165 INFO L78 Accepts]: Start accepts. Automaton has 340377 states and 436960 transitions. Word has length 102 [2022-12-14 08:33:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:25,166 INFO L495 AbstractCegarLoop]: Abstraction has 340377 states and 436960 transitions. [2022-12-14 08:33:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 08:33:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 340377 states and 436960 transitions. [2022-12-14 08:33:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:33:25,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:25,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:33:25,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:33:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 08:33:25,373 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1608664184, now seen corresponding path program 1 times [2022-12-14 08:33:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:25,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914917332] [2022-12-14 08:33:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:33:25,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914917332] [2022-12-14 08:33:25,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914917332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:33:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671416398] [2022-12-14 08:33:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:33:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:33:25,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:33:25,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:33:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:25,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:33:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:33:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:33:25,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:33:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:33:25,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671416398] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:33:25,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:33:25,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 11 [2022-12-14 08:33:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083767449] [2022-12-14 08:33:25,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:25,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:33:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:25,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:33:25,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:33:25,708 INFO L87 Difference]: Start difference. First operand 340377 states and 436960 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:33:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:51,232 INFO L93 Difference]: Finished difference Result 647188 states and 840974 transitions. [2022-12-14 08:33:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:33:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 101 [2022-12-14 08:33:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:52,110 INFO L225 Difference]: With dead ends: 647188 [2022-12-14 08:33:52,110 INFO L226 Difference]: Without dead ends: 306955 [2022-12-14 08:33:52,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:33:52,509 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 104 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:52,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 378 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:33:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306955 states. [2022-12-14 08:34:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306955 to 291826. [2022-12-14 08:34:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291826 states, 213564 states have (on average 1.251072278099305) internal successors, (267184), 217706 states have internal predecessors, (267184), 45697 states have call successors, (45697), 30520 states have call predecessors, (45697), 32564 states have return successors, (68804), 43600 states have call predecessors, (68804), 45694 states have call successors, (68804) [2022-12-14 08:34:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291826 states to 291826 states and 381685 transitions. [2022-12-14 08:34:18,153 INFO L78 Accepts]: Start accepts. Automaton has 291826 states and 381685 transitions. Word has length 101 [2022-12-14 08:34:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:18,154 INFO L495 AbstractCegarLoop]: Abstraction has 291826 states and 381685 transitions. [2022-12-14 08:34:18,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 08:34:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 291826 states and 381685 transitions. [2022-12-14 08:34:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 08:34:18,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:18,158 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:34:18,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 08:34:18,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:18,359 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1933752380, now seen corresponding path program 1 times [2022-12-14 08:34:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:18,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983368329] [2022-12-14 08:34:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:18,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 08:34:18,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:18,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983368329] [2022-12-14 08:34:18,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983368329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:18,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:18,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:34:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518760546] [2022-12-14 08:34:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:18,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:18,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:34:18,415 INFO L87 Difference]: Start difference. First operand 291826 states and 381685 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 08:34:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:42,102 INFO L93 Difference]: Finished difference Result 582281 states and 761753 transitions. [2022-12-14 08:34:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 103 [2022-12-14 08:34:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:43,073 INFO L225 Difference]: With dead ends: 582281 [2022-12-14 08:34:43,073 INFO L226 Difference]: Without dead ends: 290939 [2022-12-14 08:34:43,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:34:43,490 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 90 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:43,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 210 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290939 states. [2022-12-14 08:35:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290939 to 290799. [2022-12-14 08:35:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290799 states, 212796 states have (on average 1.2511654354405157) internal successors, (266243), 216912 states have internal predecessors, (266243), 45547 states have call successors, (45547), 30410 states have call predecessors, (45547), 32455 states have return successors, (68658), 43477 states have call predecessors, (68658), 45544 states have call successors, (68658) [2022-12-14 08:35:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290799 states to 290799 states and 380448 transitions. [2022-12-14 08:35:08,085 INFO L78 Accepts]: Start accepts. Automaton has 290799 states and 380448 transitions. Word has length 103 [2022-12-14 08:35:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:35:08,085 INFO L495 AbstractCegarLoop]: Abstraction has 290799 states and 380448 transitions. [2022-12-14 08:35:08,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 08:35:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 290799 states and 380448 transitions. [2022-12-14 08:35:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 08:35:08,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:35:08,092 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:35:08,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 08:35:08,092 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:35:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:35:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash -829956670, now seen corresponding path program 1 times [2022-12-14 08:35:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:35:08,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134771390] [2022-12-14 08:35:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:35:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 08:35:08,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:35:08,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134771390] [2022-12-14 08:35:08,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134771390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:35:08,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:35:08,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:35:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833736283] [2022-12-14 08:35:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:35:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:35:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:35:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:35:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:35:08,123 INFO L87 Difference]: Start difference. First operand 290799 states and 380448 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:35:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:35:39,280 INFO L93 Difference]: Finished difference Result 673624 states and 925565 transitions. [2022-12-14 08:35:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:35:39,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-12-14 08:35:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:35:40,529 INFO L225 Difference]: With dead ends: 673624 [2022-12-14 08:35:40,530 INFO L226 Difference]: Without dead ends: 382832 [2022-12-14 08:35:41,120 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 08:35:41,120 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 215 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:35:41,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 344 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:35:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382832 states. [2022-12-14 08:36:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382832 to 380499. [2022-12-14 08:36:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380499 states, 278453 states have (on average 1.2265552894025205) internal successors, (341538), 284343 states have internal predecessors, (341538), 59664 states have call successors, (59664), 39400 states have call predecessors, (59664), 42381 states have return successors, (91360), 56756 states have call predecessors, (91360), 59661 states have call successors, (91360) [2022-12-14 08:36:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380499 states to 380499 states and 492562 transitions. [2022-12-14 08:36:14,812 INFO L78 Accepts]: Start accepts. Automaton has 380499 states and 492562 transitions. Word has length 115 [2022-12-14 08:36:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:36:14,812 INFO L495 AbstractCegarLoop]: Abstraction has 380499 states and 492562 transitions. [2022-12-14 08:36:14,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:36:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 380499 states and 492562 transitions. [2022-12-14 08:36:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 08:36:14,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:36:14,817 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:36:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 08:36:14,817 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:36:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:36:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash 126971713, now seen corresponding path program 1 times [2022-12-14 08:36:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:36:14,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304716984] [2022-12-14 08:36:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:36:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:36:14,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:36:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304716984] [2022-12-14 08:36:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304716984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:36:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83738905] [2022-12-14 08:36:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:36:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:36:14,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:36:14,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:36:14,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:36:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:36:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:36:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:36:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 08:36:15,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:36:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83738905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:15,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:36:15,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 08:36:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819232897] [2022-12-14 08:36:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:36:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:36:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:36:15,002 INFO L87 Difference]: Start difference. First operand 380499 states and 492562 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 08:36:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:36:45,613 INFO L93 Difference]: Finished difference Result 669070 states and 868681 transitions. [2022-12-14 08:36:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:36:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 115 [2022-12-14 08:36:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:36:46,865 INFO L225 Difference]: With dead ends: 669070 [2022-12-14 08:36:46,866 INFO L226 Difference]: Without dead ends: 380504 [2022-12-14 08:36:47,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:36:47,317 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 54 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:36:47,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 223 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:36:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380504 states. [2022-12-14 08:37:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380504 to 380499. [2022-12-14 08:37:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380499 states, 278453 states have (on average 1.221340764868757) internal successors, (340086), 284343 states have internal predecessors, (340086), 59664 states have call successors, (59664), 39400 states have call predecessors, (59664), 42381 states have return successors, (91360), 56756 states have call predecessors, (91360), 59661 states have call successors, (91360) [2022-12-14 08:37:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380499 states to 380499 states and 491110 transitions. [2022-12-14 08:37:21,164 INFO L78 Accepts]: Start accepts. Automaton has 380499 states and 491110 transitions. Word has length 115 [2022-12-14 08:37:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:21,165 INFO L495 AbstractCegarLoop]: Abstraction has 380499 states and 491110 transitions. [2022-12-14 08:37:21,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 08:37:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 380499 states and 491110 transitions. [2022-12-14 08:37:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 08:37:21,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:21,169 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-12-14 08:37:21,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:37:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 08:37:21,371 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1885022753, now seen corresponding path program 1 times [2022-12-14 08:37:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:21,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260289110] [2022-12-14 08:37:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:37:21,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260289110] [2022-12-14 08:37:21,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260289110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:21,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430977900] [2022-12-14 08:37:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:21,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:21,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:21,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2238888-e4c9-48a9-96db-a99bc3be62d2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:37:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:37:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 08:37:21,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:37:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:37:22,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430977900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:37:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209862274] [2022-12-14 08:37:22,035 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 08:37:22,035 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:37:22,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:37:22,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:37:22,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:37:28,036 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 53 for LOIs [2022-12-14 08:37:28,039 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 122 for LOIs [2022-12-14 08:37:28,064 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 134 for LOIs [2022-12-14 08:37:28,092 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 134 for LOIs [2022-12-14 08:37:28,119 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 88 for LOIs [2022-12-14 08:37:28,135 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 146 for LOIs [2022-12-14 08:37:28,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:37:37,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14236253#(and (= ~P_2_ev~0 0) (= ~P_2_st~0 0) (= ~C_1_pc~0 1) (= ~e~0 0) (= ~data_0~0 0) (<= 0 ~i~0) (= (+ ~num~0 1) 0) (= ~P_1_ev~0 0) (= ~P_2_pc~0 0) (= ~P_2_i~0 1) (= ~C_1_pr~0 0) (<= ~i~0 1) (= ~P_1_i~0 1) (= ~max_loop~0 8) (<= ~timer~0 1) (= ~P_1_pc~0 0) (= |#NULL.offset| 0) (<= 0 ~timer~0) (= ~clk~0 0) (= ~C_1_ev~0 0) (<= 0 |#StackHeapBarrier|) (= ~data_1~0 0) (= ~C_1_st~0 1) (= ~C_1_i~0 1) (= |#NULL.base| 0))' at error location [2022-12-14 08:37:37,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:37:37,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:37:37,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 3, 4] total 17 [2022-12-14 08:37:37,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368333653] [2022-12-14 08:37:37,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:37:37,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:37:37,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:37:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2489, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 08:37:37,189 INFO L87 Difference]: Start difference. First operand 380499 states and 491110 transitions. Second operand has 17 states, 15 states have (on average 10.266666666666667) internal successors, (154), 16 states have internal predecessors, (154), 9 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-12-14 08:38:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:13,218 INFO L93 Difference]: Finished difference Result 782024 states and 1020664 transitions. [2022-12-14 08:38:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 08:38:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 10.266666666666667) internal successors, (154), 16 states have internal predecessors, (154), 9 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 114 [2022-12-14 08:38:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:14,607 INFO L225 Difference]: With dead ends: 782024 [2022-12-14 08:38:14,607 INFO L226 Difference]: Without dead ends: 401847 [2022-12-14 08:38:15,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 300 SyntacticMatches, 19 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8061 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1710, Invalid=15846, Unknown=0, NotChecked=0, Total=17556 [2022-12-14 08:38:15,385 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 1840 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:15,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1865 Valid, 1676 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 08:38:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401847 states.