./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.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_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/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_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/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_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/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 a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb --- 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 09:58:20,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:58:20,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:58:20,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:58:20,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:58:20,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:58:20,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:58:20,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:58:20,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:58:20,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:58:20,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:58:20,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:58:20,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:58:20,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:58:20,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:58:20,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:58:20,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:58:20,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:58:20,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:58:20,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:58:20,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:58:20,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:58:20,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:58:20,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:58:20,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:58:20,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:58:20,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:58:20,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:58:20,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:58:20,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:58:20,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:58:20,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:58:20,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:58:20,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:58:20,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:58:20,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:58:20,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:58:20,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:58:20,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:58:20,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:58:20,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:58:20,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:58:20,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:58:20,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:58:20,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:58:20,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:58:20,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:58:20,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:58:20,158 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:58:20,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:58:20,159 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:58:20,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:58:20,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:58:20,160 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:58:20,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:58:20,160 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:58:20,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:58:20,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:58:20,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:58:20,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:58:20,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:58:20,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:58:20,162 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:58:20,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:58:20,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:58:20,163 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:58:20,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:58:20,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:58:20,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:58:20,163 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_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb [2022-12-14 09:58:20,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:58:20,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:58:20,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:58:20,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:58:20,383 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:58:20,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2022-12-14 09:58:23,010 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:58:23,239 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:58:23,240 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2022-12-14 09:58:23,255 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/data/27a9456d8/1d0890612bb8446ba9c8f2ca6992fd4e/FLAGf353b39f9 [2022-12-14 09:58:23,269 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/data/27a9456d8/1d0890612bb8446ba9c8f2ca6992fd4e [2022-12-14 09:58:23,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:58:23,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:58:23,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:58:23,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:58:23,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:58:23,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66353599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23, skipping insertion in model container [2022-12-14 09:58:23,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:58:23,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:58:23,700 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_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2022-12-14 09:58:23,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:58:23,749 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:58:23,838 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_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2022-12-14 09:58:23,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:58:23,880 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:58:23,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23 WrapperNode [2022-12-14 09:58:23,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:58:23,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:58:23,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:58:23,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:58:23,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,953 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 966 [2022-12-14 09:58:23,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:58:23,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:58:23,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:58:23,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:58:23,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:23,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:24,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:24,007 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:24,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:24,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:58:24,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:58:24,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:58:24,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:58:24,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (1/1) ... [2022-12-14 09:58:24,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:58:24,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:24,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:58:24,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:58:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 09:58:24,097 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 09:58:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 09:58:24,097 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 09:58:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 09:58:24,097 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 09:58:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 09:58:24,098 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 09:58:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 09:58:24,098 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 09:58:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 09:58:24,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 09:58:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 09:58:24,099 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 09:58:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 09:58:24,099 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 09:58:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 09:58:24,099 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 09:58:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 09:58:24,099 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 09:58:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 09:58:24,100 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 09:58:24,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:58:24,100 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 09:58:24,100 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 09:58:24,100 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 09:58:24,100 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 09:58:24,101 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 09:58:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 09:58:24,101 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 09:58:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 09:58:24,101 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 09:58:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 09:58:24,101 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 09:58:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 09:58:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 09:58:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 09:58:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 09:58:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 09:58:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 09:58:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 09:58:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 09:58:24,103 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 09:58:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 09:58:24,103 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 09:58:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 09:58:24,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 09:58:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 09:58:24,103 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 09:58:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:58:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 09:58:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 09:58:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:58:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:58:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 09:58:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 09:58:24,226 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:58:24,228 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:58:25,038 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:58:25,454 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:58:25,454 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:58:25,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:58:25 BoogieIcfgContainer [2022-12-14 09:58:25,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:58:25,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:58:25,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:58:25,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:58:25,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:58:23" (1/3) ... [2022-12-14 09:58:25,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f047bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:58:25, skipping insertion in model container [2022-12-14 09:58:25,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:23" (2/3) ... [2022-12-14 09:58:25,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f047bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:58:25, skipping insertion in model container [2022-12-14 09:58:25,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:58:25" (3/3) ... [2022-12-14 09:58:25,462 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2022-12-14 09:58:25,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:58:25,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:58:25,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:58:25,523 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;@3378689f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:58:25,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:58:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-12-14 09:58:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 09:58:25,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:25,542 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:25,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 137456996, now seen corresponding path program 1 times [2022-12-14 09:58:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:25,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116709610] [2022-12-14 09:58:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:25,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:58:25,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116709610] [2022-12-14 09:58:25,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116709610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:25,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:25,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:58:25,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623004568] [2022-12-14 09:58:25,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:58:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:58:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:58:25,848 INFO L87 Difference]: Start difference. First operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-12-14 09:58:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:25,985 INFO L93 Difference]: Finished difference Result 415 states and 652 transitions. [2022-12-14 09:58:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:58:25,987 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-12-14 09:58:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:25,998 INFO L225 Difference]: With dead ends: 415 [2022-12-14 09:58:25,998 INFO L226 Difference]: Without dead ends: 393 [2022-12-14 09:58:26,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:58:26,003 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:26,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:58:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-14 09:58:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-12-14 09:58:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 265 states have (on average 1.5660377358490567) internal successors, (415), 284 states have internal predecessors, (415), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 09:58:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 614 transitions. [2022-12-14 09:58:26,059 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 614 transitions. Word has length 77 [2022-12-14 09:58:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:26,061 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 614 transitions. [2022-12-14 09:58:26,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-12-14 09:58:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 614 transitions. [2022-12-14 09:58:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 09:58:26,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:26,065 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:58:26,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1346871232, now seen corresponding path program 1 times [2022-12-14 09:58:26,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:26,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128116721] [2022-12-14 09:58:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:58:26,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:26,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128116721] [2022-12-14 09:58:26,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128116721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:26,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:26,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:58:26,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910511155] [2022-12-14 09:58:26,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:26,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:58:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:58:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:58:26,325 INFO L87 Difference]: Start difference. First operand 393 states and 614 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 09:58:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:27,916 INFO L93 Difference]: Finished difference Result 1210 states and 1921 transitions. [2022-12-14 09:58:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:58:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-12-14 09:58:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:27,924 INFO L225 Difference]: With dead ends: 1210 [2022-12-14 09:58:27,924 INFO L226 Difference]: Without dead ends: 833 [2022-12-14 09:58:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:58:27,929 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:27,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1606 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 09:58:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-12-14 09:58:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2022-12-14 09:58:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 537 states have (on average 1.5772811918063314) internal successors, (847), 570 states have internal predecessors, (847), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-12-14 09:58:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1244 transitions. [2022-12-14 09:58:27,998 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1244 transitions. Word has length 78 [2022-12-14 09:58:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:27,999 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1244 transitions. [2022-12-14 09:58:27,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 09:58:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1244 transitions. [2022-12-14 09:58:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 09:58:28,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:28,003 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:28,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:58:28,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1307591302, now seen corresponding path program 1 times [2022-12-14 09:58:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:28,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614008957] [2022-12-14 09:58:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:58:28,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614008957] [2022-12-14 09:58:28,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614008957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:28,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:28,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:58:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024754341] [2022-12-14 09:58:28,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:28,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:58:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:58:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:58:28,275 INFO L87 Difference]: Start difference. First operand 784 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 09:58:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:28,797 INFO L93 Difference]: Finished difference Result 855 states and 1356 transitions. [2022-12-14 09:58:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:28,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 09:58:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:28,802 INFO L225 Difference]: With dead ends: 855 [2022-12-14 09:58:28,802 INFO L226 Difference]: Without dead ends: 840 [2022-12-14 09:58:28,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:58:28,804 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 708 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:28,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1900 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:58:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-12-14 09:58:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 788. [2022-12-14 09:58:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5730129390018484) internal successors, (851), 574 states have internal predecessors, (851), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-12-14 09:58:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1248 transitions. [2022-12-14 09:58:28,850 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1248 transitions. Word has length 82 [2022-12-14 09:58:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:28,851 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1248 transitions. [2022-12-14 09:58:28,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 09:58:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1248 transitions. [2022-12-14 09:58:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 09:58:28,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:28,853 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:58:28,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1423343622, now seen corresponding path program 1 times [2022-12-14 09:58:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:28,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291924430] [2022-12-14 09:58:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:58:29,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:29,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291924430] [2022-12-14 09:58:29,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291924430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:29,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:29,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:58:29,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361101415] [2022-12-14 09:58:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:58:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:29,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:58:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:29,049 INFO L87 Difference]: Start difference. First operand 788 states and 1248 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 09:58:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:29,186 INFO L93 Difference]: Finished difference Result 807 states and 1272 transitions. [2022-12-14 09:58:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:58:29,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-12-14 09:58:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:29,190 INFO L225 Difference]: With dead ends: 807 [2022-12-14 09:58:29,190 INFO L226 Difference]: Without dead ends: 792 [2022-12-14 09:58:29,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:58:29,192 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 30 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:29,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2278 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:58:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-12-14 09:58:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 788. [2022-12-14 09:58:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5693160813308689) internal successors, (849), 574 states have internal predecessors, (849), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-12-14 09:58:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2022-12-14 09:58:29,224 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 87 [2022-12-14 09:58:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:29,224 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2022-12-14 09:58:29,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 09:58:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2022-12-14 09:58:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 09:58:29,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:29,226 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:58:29,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1510916396, now seen corresponding path program 1 times [2022-12-14 09:58:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14093478] [2022-12-14 09:58:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:58:29,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14093478] [2022-12-14 09:58:29,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14093478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:29,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:29,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:58:29,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260053479] [2022-12-14 09:58:29,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:29,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:29,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:29,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:29,404 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:30,621 INFO L93 Difference]: Finished difference Result 2521 states and 4055 transitions. [2022-12-14 09:58:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-12-14 09:58:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:30,633 INFO L225 Difference]: With dead ends: 2521 [2022-12-14 09:58:30,634 INFO L226 Difference]: Without dead ends: 1749 [2022-12-14 09:58:30,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:30,639 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1220 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:30,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 703 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 09:58:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-12-14 09:58:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1583. [2022-12-14 09:58:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1109 states have (on average 1.5807033363390441) internal successors, (1753), 1172 states have internal predecessors, (1753), 381 states have call successors, (381), 87 states have call predecessors, (381), 92 states have return successors, (399), 359 states have call predecessors, (399), 376 states have call successors, (399) [2022-12-14 09:58:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2533 transitions. [2022-12-14 09:58:30,760 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2533 transitions. Word has length 94 [2022-12-14 09:58:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:30,761 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2533 transitions. [2022-12-14 09:58:30,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2533 transitions. [2022-12-14 09:58:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 09:58:30,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:30,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:30,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:58:30,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -406381504, now seen corresponding path program 1 times [2022-12-14 09:58:30,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:30,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77624391] [2022-12-14 09:58:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:30,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:58:30,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:30,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77624391] [2022-12-14 09:58:30,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77624391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:30,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:30,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:58:30,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758421475] [2022-12-14 09:58:30,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:30,953 INFO L87 Difference]: Start difference. First operand 1583 states and 2533 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:32,203 INFO L93 Difference]: Finished difference Result 4838 states and 7859 transitions. [2022-12-14 09:58:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-12-14 09:58:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:32,218 INFO L225 Difference]: With dead ends: 4838 [2022-12-14 09:58:32,218 INFO L226 Difference]: Without dead ends: 3274 [2022-12-14 09:58:32,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:32,225 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1211 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:32,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 710 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 09:58:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-12-14 09:58:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 3061. [2022-12-14 09:58:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2167 states have (on average 1.5874480849100139) internal successors, (3440), 2297 states have internal predecessors, (3440), 710 states have call successors, (710), 165 states have call predecessors, (710), 183 states have return successors, (788), 660 states have call predecessors, (788), 705 states have call successors, (788) [2022-12-14 09:58:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 4938 transitions. [2022-12-14 09:58:32,400 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 4938 transitions. Word has length 95 [2022-12-14 09:58:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:32,400 INFO L495 AbstractCegarLoop]: Abstraction has 3061 states and 4938 transitions. [2022-12-14 09:58:32,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 4938 transitions. [2022-12-14 09:58:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 09:58:32,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:32,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:32,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:58:32,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash 286929646, now seen corresponding path program 1 times [2022-12-14 09:58:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:32,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843786609] [2022-12-14 09:58:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:32,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:58:32,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843786609] [2022-12-14 09:58:32,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843786609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:32,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:32,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:58:32,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053028391] [2022-12-14 09:58:32,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:32,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:32,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:32,538 INFO L87 Difference]: Start difference. First operand 3061 states and 4938 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:33,937 INFO L93 Difference]: Finished difference Result 9314 states and 15343 transitions. [2022-12-14 09:58:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-12-14 09:58:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:33,979 INFO L225 Difference]: With dead ends: 9314 [2022-12-14 09:58:33,980 INFO L226 Difference]: Without dead ends: 6278 [2022-12-14 09:58:34,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:34,001 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1198 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:34,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 721 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 09:58:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-12-14 09:58:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 5962. [2022-12-14 09:58:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5962 states, 4238 states have (on average 1.5875412930627655) internal successors, (6728), 4508 states have internal predecessors, (6728), 1352 states have call successors, (1352), 321 states have call predecessors, (1352), 371 states have return successors, (1642), 1246 states have call predecessors, (1642), 1347 states have call successors, (1642) [2022-12-14 09:58:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5962 states to 5962 states and 9722 transitions. [2022-12-14 09:58:34,336 INFO L78 Accepts]: Start accepts. Automaton has 5962 states and 9722 transitions. Word has length 96 [2022-12-14 09:58:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:34,336 INFO L495 AbstractCegarLoop]: Abstraction has 5962 states and 9722 transitions. [2022-12-14 09:58:34,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5962 states and 9722 transitions. [2022-12-14 09:58:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 09:58:34,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:34,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:34,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:58:34,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash 304742722, now seen corresponding path program 1 times [2022-12-14 09:58:34,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:34,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273677969] [2022-12-14 09:58:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:34,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:58:34,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:34,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273677969] [2022-12-14 09:58:34,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273677969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:34,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:34,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:58:34,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741856611] [2022-12-14 09:58:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:34,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:34,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:34,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:34,458 INFO L87 Difference]: Start difference. First operand 5962 states and 9722 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:36,066 INFO L93 Difference]: Finished difference Result 18119 states and 30598 transitions. [2022-12-14 09:58:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2022-12-14 09:58:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:36,116 INFO L225 Difference]: With dead ends: 18119 [2022-12-14 09:58:36,116 INFO L226 Difference]: Without dead ends: 12194 [2022-12-14 09:58:36,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:36,138 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 1185 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:36,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1260 Valid, 730 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:58:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2022-12-14 09:58:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 11663. [2022-12-14 09:58:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11663 states, 8297 states have (on average 1.5841870555622515) internal successors, (13144), 8859 states have internal predecessors, (13144), 2606 states have call successors, (2606), 633 states have call predecessors, (2606), 759 states have return successors, (3648), 2388 states have call predecessors, (3648), 2601 states have call successors, (3648) [2022-12-14 09:58:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11663 states to 11663 states and 19398 transitions. [2022-12-14 09:58:36,936 INFO L78 Accepts]: Start accepts. Automaton has 11663 states and 19398 transitions. Word has length 97 [2022-12-14 09:58:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:36,936 INFO L495 AbstractCegarLoop]: Abstraction has 11663 states and 19398 transitions. [2022-12-14 09:58:36,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 11663 states and 19398 transitions. [2022-12-14 09:58:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 09:58:36,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:36,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:36,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:58:36,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash 856951984, now seen corresponding path program 1 times [2022-12-14 09:58:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:36,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257018628] [2022-12-14 09:58:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:36,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:58:37,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:37,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257018628] [2022-12-14 09:58:37,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257018628] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:37,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:37,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:58:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164015189] [2022-12-14 09:58:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:37,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:37,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:37,108 INFO L87 Difference]: Start difference. First operand 11663 states and 19398 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:39,248 INFO L93 Difference]: Finished difference Result 35520 states and 62814 transitions. [2022-12-14 09:58:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2022-12-14 09:58:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:39,333 INFO L225 Difference]: With dead ends: 35520 [2022-12-14 09:58:39,333 INFO L226 Difference]: Without dead ends: 23908 [2022-12-14 09:58:39,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:39,366 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1176 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:39,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1250 Valid, 744 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 09:58:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23908 states. [2022-12-14 09:58:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23908 to 22836. [2022-12-14 09:58:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22836 states, 16271 states have (on average 1.582631675987954) internal successors, (25751), 17395 states have internal predecessors, (25751), 5054 states have call successors, (5054), 1255 states have call predecessors, (5054), 1510 states have return successors, (8491), 4611 states have call predecessors, (8491), 5049 states have call successors, (8491) [2022-12-14 09:58:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22836 states to 22836 states and 39296 transitions. [2022-12-14 09:58:41,169 INFO L78 Accepts]: Start accepts. Automaton has 22836 states and 39296 transitions. Word has length 98 [2022-12-14 09:58:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:41,169 INFO L495 AbstractCegarLoop]: Abstraction has 22836 states and 39296 transitions. [2022-12-14 09:58:41,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:58:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 22836 states and 39296 transitions. [2022-12-14 09:58:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 09:58:41,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:41,175 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:41,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:58:41,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1986745058, now seen corresponding path program 1 times [2022-12-14 09:58:41,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:41,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105451489] [2022-12-14 09:58:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 09:58:41,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:41,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105451489] [2022-12-14 09:58:41,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105451489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:41,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:41,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:58:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902266954] [2022-12-14 09:58:41,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:41,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:41,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:41,338 INFO L87 Difference]: Start difference. First operand 22836 states and 39296 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 09:58:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:42,986 INFO L93 Difference]: Finished difference Result 48931 states and 87571 transitions. [2022-12-14 09:58:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2022-12-14 09:58:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:43,113 INFO L225 Difference]: With dead ends: 48931 [2022-12-14 09:58:43,113 INFO L226 Difference]: Without dead ends: 26112 [2022-12-14 09:58:43,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:43,189 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 116 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:43,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1832 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:58:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26112 states. [2022-12-14 09:58:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26112 to 23076. [2022-12-14 09:58:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 16494 states have (on average 1.5776039772038317) internal successors, (26021), 17602 states have internal predecessors, (26021), 5071 states have call successors, (5071), 1255 states have call predecessors, (5071), 1510 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:58:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 39600 transitions. [2022-12-14 09:58:44,729 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 39600 transitions. Word has length 146 [2022-12-14 09:58:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:44,729 INFO L495 AbstractCegarLoop]: Abstraction has 23076 states and 39600 transitions. [2022-12-14 09:58:44,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 09:58:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 39600 transitions. [2022-12-14 09:58:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 09:58:44,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:44,734 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:44,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:58:44,734 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1642234558, now seen corresponding path program 1 times [2022-12-14 09:58:44,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:44,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733030579] [2022-12-14 09:58:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:44,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 09:58:45,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733030579] [2022-12-14 09:58:45,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733030579] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185514690] [2022-12-14 09:58:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:45,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:45,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:45,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:45,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:58:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:58:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 09:58:45,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:58:45,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185514690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:45,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:58:45,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2022-12-14 09:58:45,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840323960] [2022-12-14 09:58:45,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:45,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:45,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:58:45,972 INFO L87 Difference]: Start difference. First operand 23076 states and 39600 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:58:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:47,677 INFO L93 Difference]: Finished difference Result 48631 states and 86786 transitions. [2022-12-14 09:58:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 153 [2022-12-14 09:58:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:47,817 INFO L225 Difference]: With dead ends: 48631 [2022-12-14 09:58:47,817 INFO L226 Difference]: Without dead ends: 25572 [2022-12-14 09:58:47,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:58:47,907 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:47,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:58:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25572 states. [2022-12-14 09:58:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25572 to 25572. [2022-12-14 09:58:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25572 states, 18926 states have (on average 1.6217372926133362) internal successors, (30693), 20034 states have internal predecessors, (30693), 5071 states have call successors, (5071), 1319 states have call predecessors, (5071), 1574 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:58:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25572 states to 25572 states and 44272 transitions. [2022-12-14 09:58:49,308 INFO L78 Accepts]: Start accepts. Automaton has 25572 states and 44272 transitions. Word has length 153 [2022-12-14 09:58:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 25572 states and 44272 transitions. [2022-12-14 09:58:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:58:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 25572 states and 44272 transitions. [2022-12-14 09:58:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 09:58:49,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:49,313 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:49,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:58:49,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash -146909361, now seen corresponding path program 1 times [2022-12-14 09:58:49,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:49,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977035957] [2022-12-14 09:58:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 09:58:49,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977035957] [2022-12-14 09:58:49,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977035957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999909050] [2022-12-14 09:58:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:49,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:49,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:58:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:49,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:58:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:58:49,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:58:49,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999909050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:49,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:58:49,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 09:58:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655450925] [2022-12-14 09:58:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:58:49,932 INFO L87 Difference]: Start difference. First operand 25572 states and 44272 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:58:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:51,169 INFO L93 Difference]: Finished difference Result 53623 states and 96064 transitions. [2022-12-14 09:58:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 158 [2022-12-14 09:58:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:51,284 INFO L225 Difference]: With dead ends: 53623 [2022-12-14 09:58:51,284 INFO L226 Difference]: Without dead ends: 28068 [2022-12-14 09:58:51,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 09:58:51,361 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 211 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:51,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1506 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:58:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28068 states. [2022-12-14 09:58:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28068 to 28068. [2022-12-14 09:58:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28068 states, 21358 states have (on average 1.6558198333177263) internal successors, (35365), 22466 states have internal predecessors, (35365), 5071 states have call successors, (5071), 1383 states have call predecessors, (5071), 1638 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:58:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28068 states to 28068 states and 48944 transitions. [2022-12-14 09:58:52,721 INFO L78 Accepts]: Start accepts. Automaton has 28068 states and 48944 transitions. Word has length 158 [2022-12-14 09:58:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:52,721 INFO L495 AbstractCegarLoop]: Abstraction has 28068 states and 48944 transitions. [2022-12-14 09:58:52,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:58:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28068 states and 48944 transitions. [2022-12-14 09:58:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 09:58:52,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:52,728 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:52,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:52,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 867197375, now seen corresponding path program 1 times [2022-12-14 09:58:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253664717] [2022-12-14 09:58:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 09:58:54,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253664717] [2022-12-14 09:58:54,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253664717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092414301] [2022-12-14 09:58:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:54,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:54,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:54,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:54,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:58:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:58:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 09:58:55,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:58:55,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092414301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:55,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:58:55,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 09:58:55,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459723065] [2022-12-14 09:58:55,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:58:55,068 INFO L87 Difference]: Start difference. First operand 28068 states and 48944 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:58:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:56,461 INFO L93 Difference]: Finished difference Result 58615 states and 105342 transitions. [2022-12-14 09:58:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:56,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 162 [2022-12-14 09:58:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:56,548 INFO L225 Difference]: With dead ends: 58615 [2022-12-14 09:58:56,549 INFO L226 Difference]: Without dead ends: 30564 [2022-12-14 09:58:56,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:58:56,612 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 209 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:56,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1506 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:58:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30564 states. [2022-12-14 09:58:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30564 to 30564. [2022-12-14 09:58:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30564 states, 23790 states have (on average 1.6829340058848257) internal successors, (40037), 24898 states have internal predecessors, (40037), 5071 states have call successors, (5071), 1447 states have call predecessors, (5071), 1702 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:58:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30564 states to 30564 states and 53616 transitions. [2022-12-14 09:58:57,871 INFO L78 Accepts]: Start accepts. Automaton has 30564 states and 53616 transitions. Word has length 162 [2022-12-14 09:58:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:57,872 INFO L495 AbstractCegarLoop]: Abstraction has 30564 states and 53616 transitions. [2022-12-14 09:58:57,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:58:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 30564 states and 53616 transitions. [2022-12-14 09:58:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-12-14 09:58:57,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:57,877 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:57,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:58:58,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 09:58:58,078 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash -546161034, now seen corresponding path program 1 times [2022-12-14 09:58:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:58,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508148260] [2022-12-14 09:58:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:58,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 09:58:59,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508148260] [2022-12-14 09:58:59,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508148260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:59,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116271192] [2022-12-14 09:58:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:59,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:59,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:59,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:59,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:58:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1882 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:58:59,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:58:59,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:58:59,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116271192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:59,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:58:59,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 09:58:59,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772544541] [2022-12-14 09:58:59,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:59,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:59,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:58:59,525 INFO L87 Difference]: Start difference. First operand 30564 states and 53616 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:59:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:00,821 INFO L93 Difference]: Finished difference Result 63607 states and 114620 transitions. [2022-12-14 09:59:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:59:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 165 [2022-12-14 09:59:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:00,914 INFO L225 Difference]: With dead ends: 63607 [2022-12-14 09:59:00,914 INFO L226 Difference]: Without dead ends: 33060 [2022-12-14 09:59:00,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:59:00,976 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 207 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:00,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1506 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:59:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33060 states. [2022-12-14 09:59:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33060 to 33060. [2022-12-14 09:59:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33060 states, 26222 states have (on average 1.7050186865990389) internal successors, (44709), 27330 states have internal predecessors, (44709), 5071 states have call successors, (5071), 1511 states have call predecessors, (5071), 1766 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:59:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33060 states to 33060 states and 58288 transitions. [2022-12-14 09:59:02,363 INFO L78 Accepts]: Start accepts. Automaton has 33060 states and 58288 transitions. Word has length 165 [2022-12-14 09:59:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:02,364 INFO L495 AbstractCegarLoop]: Abstraction has 33060 states and 58288 transitions. [2022-12-14 09:59:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:59:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 33060 states and 58288 transitions. [2022-12-14 09:59:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 09:59:02,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:02,369 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:02,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 09:59:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 09:59:02,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:59:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash -285259354, now seen corresponding path program 1 times [2022-12-14 09:59:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410345785] [2022-12-14 09:59:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 09:59:03,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410345785] [2022-12-14 09:59:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410345785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115308064] [2022-12-14 09:59:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:03,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:03,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:03,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:03,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:59:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:59:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 09:59:04,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:59:04,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115308064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:59:04,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:59:04,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 09:59:04,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495762647] [2022-12-14 09:59:04,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:59:04,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:59:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:59:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:59:04,044 INFO L87 Difference]: Start difference. First operand 33060 states and 58288 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:59:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:05,254 INFO L93 Difference]: Finished difference Result 68599 states and 123898 transitions. [2022-12-14 09:59:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:59:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2022-12-14 09:59:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:05,348 INFO L225 Difference]: With dead ends: 68599 [2022-12-14 09:59:05,348 INFO L226 Difference]: Without dead ends: 35556 [2022-12-14 09:59:05,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:59:05,410 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 205 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:05,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1506 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:59:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35556 states. [2022-12-14 09:59:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35556 to 35556. [2022-12-14 09:59:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35556 states, 28654 states have (on average 1.7233545054791652) internal successors, (49381), 29762 states have internal predecessors, (49381), 5071 states have call successors, (5071), 1575 states have call predecessors, (5071), 1830 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:59:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35556 states to 35556 states and 62960 transitions. [2022-12-14 09:59:06,741 INFO L78 Accepts]: Start accepts. Automaton has 35556 states and 62960 transitions. Word has length 167 [2022-12-14 09:59:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:06,742 INFO L495 AbstractCegarLoop]: Abstraction has 35556 states and 62960 transitions. [2022-12-14 09:59:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 09:59:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 35556 states and 62960 transitions. [2022-12-14 09:59:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 09:59:06,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:06,747 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:06,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:59:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:06,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:59:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 299312853, now seen corresponding path program 1 times [2022-12-14 09:59:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:06,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973514859] [2022-12-14 09:59:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 09:59:08,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973514859] [2022-12-14 09:59:08,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973514859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462762756] [2022-12-14 09:59:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:08,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:08,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:08,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:08,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:59:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:59:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 09:59:08,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:59:08,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462762756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:59:08,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:59:08,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 09:59:08,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818527852] [2022-12-14 09:59:08,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:59:08,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:59:08,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:59:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:59:08,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:59:08,457 INFO L87 Difference]: Start difference. First operand 35556 states and 62960 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-14 09:59:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:59:09,918 INFO L93 Difference]: Finished difference Result 37176 states and 68603 transitions. [2022-12-14 09:59:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:59:09,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 167 [2022-12-14 09:59:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:59:10,026 INFO L225 Difference]: With dead ends: 37176 [2022-12-14 09:59:10,026 INFO L226 Difference]: Without dead ends: 37019 [2022-12-14 09:59:10,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:59:10,040 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 44 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:59:10,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1789 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:59:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37019 states. [2022-12-14 09:59:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37019 to 35680. [2022-12-14 09:59:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35680 states, 28778 states have (on average 1.7202376815623046) internal successors, (49505), 29886 states have internal predecessors, (49505), 5071 states have call successors, (5071), 1575 states have call predecessors, (5071), 1830 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-12-14 09:59:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35680 states to 35680 states and 63084 transitions. [2022-12-14 09:59:11,446 INFO L78 Accepts]: Start accepts. Automaton has 35680 states and 63084 transitions. Word has length 167 [2022-12-14 09:59:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:59:11,446 INFO L495 AbstractCegarLoop]: Abstraction has 35680 states and 63084 transitions. [2022-12-14 09:59:11,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-12-14 09:59:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 35680 states and 63084 transitions. [2022-12-14 09:59:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 09:59:11,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:59:11,455 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:59:11,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:59:11,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:59:11,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:59:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:59:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1931032933, now seen corresponding path program 1 times [2022-12-14 09:59:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:59:11,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908353279] [2022-12-14 09:59:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:59:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 09:59:12,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:59:12,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908353279] [2022-12-14 09:59:12,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908353279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:59:12,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622151847] [2022-12-14 09:59:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:59:12,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:59:12,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:59:12,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:59:12,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70db62b-4af5-4ffe-8b49-2e5dbcc515a3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:59:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:59:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 09:59:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:59:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 09:59:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:59:15,766 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 09:59:21,820 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 09:59:22,146 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 09:59:28,218 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 09:59:28,495 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 09:59:34,329 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 09:59:34,612 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 09:59:40,928 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 09:59:41,025 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 10:02:12,295 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.