./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:41:44,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:44,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:44,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:44,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:44,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:44,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:44,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:44,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:44,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:44,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:44,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:44,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:44,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:44,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:44,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:44,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:44,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:44,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:44,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:44,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:44,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:44,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:44,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:44,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:44,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:44,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:44,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:44,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:44,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:44,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:44,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:44,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:44,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:44,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:44,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:44,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:44,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:44,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:44,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:44,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:44,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:41:44,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:44,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:44,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:44,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:44,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:44,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:44,329 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:44,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:44,329 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:44,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:41:44,330 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:44,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:44,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:41:44,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:41:44,331 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:44,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:41:44,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:41:44,332 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:41:44,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:44,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:41:44,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:41:44,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:41:44,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:44,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:44,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:44,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:44,334 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:41:44,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:44,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:44,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:44,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:44,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:44,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:44,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:44,336 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:41:44,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:44,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:44,337 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:41:44,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:41:44,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:44,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:44,338 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_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 [2022-11-03 02:41:44,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:44,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:44,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:44,642 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:44,643 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:44,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2022-11-03 02:41:44,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/data/71636a891/6b26b2679aea493dbb1d540d50606fd3/FLAG1073e2343 [2022-11-03 02:41:45,419 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:45,420 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2022-11-03 02:41:45,455 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/data/71636a891/6b26b2679aea493dbb1d540d50606fd3/FLAG1073e2343 [2022-11-03 02:41:45,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/data/71636a891/6b26b2679aea493dbb1d540d50606fd3 [2022-11-03 02:41:45,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:45,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:45,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:45,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:45,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:45,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:45" (1/1) ... [2022-11-03 02:41:45,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45926192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:45, skipping insertion in model container [2022-11-03 02:41:45,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:45" (1/1) ... [2022-11-03 02:41:45,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:45,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:46,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2022-11-03 02:41:46,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:46,329 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:46,429 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2022-11-03 02:41:46,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:46,448 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:46,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46 WrapperNode [2022-11-03 02:41:46,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:46,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:46,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:46,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:46,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,551 INFO L138 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 793 [2022-11-03 02:41:46,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:46,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:46,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:46,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:46,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,705 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:46,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:46,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:46,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:46,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (1/1) ... [2022-11-03 02:41:46,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:46,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:46,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:46,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:41:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:41:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:41:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:41:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:41:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:41:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:46,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:47,119 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:47,122 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:47,170 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 02:41:48,917 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-11-03 02:41:48,919 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-11-03 02:41:48,919 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:49,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:49,461 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:41:49,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:49 BoogieIcfgContainer [2022-11-03 02:41:49,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:49,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:49,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:49,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:49,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:45" (1/3) ... [2022-11-03 02:41:49,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734b1814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:49, skipping insertion in model container [2022-11-03 02:41:49,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:46" (2/3) ... [2022-11-03 02:41:49,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734b1814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:49, skipping insertion in model container [2022-11-03 02:41:49,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:49" (3/3) ... [2022-11-03 02:41:49,484 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.08.i.cil-2.c [2022-11-03 02:41:49,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:49,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:49,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:49,612 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;@79697020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:49,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:41:49,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:49,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:49,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1960437469, now seen corresponding path program 1 times [2022-11-03 02:41:49,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346140699] [2022-11-03 02:41:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:49,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:51,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:51,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346140699] [2022-11-03 02:41:51,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346140699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:51,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:51,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190892549] [2022-11-03 02:41:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:51,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:51,076 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:53,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:53,788 INFO L93 Difference]: Finished difference Result 241 states and 416 transitions. [2022-11-03 02:41:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 02:41:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:53,802 INFO L225 Difference]: With dead ends: 241 [2022-11-03 02:41:53,802 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 02:41:53,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:53,809 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 20 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:53,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 399 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:41:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 02:41:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 02:41:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 115 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 177 transitions. [2022-11-03 02:41:53,860 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 177 transitions. Word has length 36 [2022-11-03 02:41:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:53,861 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 177 transitions. [2022-11-03 02:41:53,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 177 transitions. [2022-11-03 02:41:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:41:53,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:53,864 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:53,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:41:53,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash -262331975, now seen corresponding path program 1 times [2022-11-03 02:41:53,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:53,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404474049] [2022-11-03 02:41:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:53,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:54,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404474049] [2022-11-03 02:41:54,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404474049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:54,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:54,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:54,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719932887] [2022-11-03 02:41:54,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:54,682 INFO L87 Difference]: Start difference. First operand 116 states and 177 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:56,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:57,211 INFO L93 Difference]: Finished difference Result 232 states and 348 transitions. [2022-11-03 02:41:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-03 02:41:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:57,215 INFO L225 Difference]: With dead ends: 232 [2022-11-03 02:41:57,215 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 02:41:57,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:57,218 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 19 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:57,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 331 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:41:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 02:41:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 02:41:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5304347826086957) internal successors, (176), 115 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 176 transitions. [2022-11-03 02:41:57,243 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 176 transitions. Word has length 46 [2022-11-03 02:41:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:57,243 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 176 transitions. [2022-11-03 02:41:57,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 176 transitions. [2022-11-03 02:41:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:41:57,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:57,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:41:57,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1081392473, now seen corresponding path program 1 times [2022-11-03 02:41:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:57,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058593677] [2022-11-03 02:41:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:57,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:57,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058593677] [2022-11-03 02:41:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058593677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:57,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:57,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642628438] [2022-11-03 02:41:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:57,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:57,950 INFO L87 Difference]: Start difference. First operand 116 states and 176 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:59,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:00,450 INFO L93 Difference]: Finished difference Result 232 states and 347 transitions. [2022-11-03 02:42:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:00,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 02:42:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:00,454 INFO L225 Difference]: With dead ends: 232 [2022-11-03 02:42:00,454 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 02:42:00,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:00,456 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 17 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:00,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 330 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 02:42:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 02:42:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5217391304347827) internal successors, (175), 115 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 175 transitions. [2022-11-03 02:42:00,480 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 175 transitions. Word has length 47 [2022-11-03 02:42:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:00,480 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 175 transitions. [2022-11-03 02:42:00,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 175 transitions. [2022-11-03 02:42:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:42:00,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:00,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:42:00,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2031134539, now seen corresponding path program 1 times [2022-11-03 02:42:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:00,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44842963] [2022-11-03 02:42:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:01,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44842963] [2022-11-03 02:42:01,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44842963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:01,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:01,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:01,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918955143] [2022-11-03 02:42:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:01,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:01,056 INFO L87 Difference]: Start difference. First operand 116 states and 175 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:03,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:03,679 INFO L93 Difference]: Finished difference Result 321 states and 486 transitions. [2022-11-03 02:42:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 02:42:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:03,682 INFO L225 Difference]: With dead ends: 321 [2022-11-03 02:42:03,682 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 02:42:03,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:03,685 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 118 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:03,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 227 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:42:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 02:42:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 127. [2022-11-03 02:42:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.507936507936508) internal successors, (190), 126 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 190 transitions. [2022-11-03 02:42:03,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 190 transitions. Word has length 48 [2022-11-03 02:42:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:03,699 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 190 transitions. [2022-11-03 02:42:03,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 190 transitions. [2022-11-03 02:42:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:42:03,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:03,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:03,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:42:03,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1523985838, now seen corresponding path program 1 times [2022-11-03 02:42:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:03,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525397709] [2022-11-03 02:42:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:04,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:04,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525397709] [2022-11-03 02:42:04,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525397709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:04,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:04,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432953919] [2022-11-03 02:42:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:04,197 INFO L87 Difference]: Start difference. First operand 127 states and 190 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:06,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:06,812 INFO L93 Difference]: Finished difference Result 343 states and 516 transitions. [2022-11-03 02:42:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:06,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 02:42:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:06,816 INFO L225 Difference]: With dead ends: 343 [2022-11-03 02:42:06,816 INFO L226 Difference]: Without dead ends: 228 [2022-11-03 02:42:06,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:06,818 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 114 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:06,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 227 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:42:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-03 02:42:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2022-11-03 02:42:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5) internal successors, (210), 140 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 210 transitions. [2022-11-03 02:42:06,853 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 210 transitions. Word has length 48 [2022-11-03 02:42:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:06,853 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 210 transitions. [2022-11-03 02:42:06,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 210 transitions. [2022-11-03 02:42:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:42:06,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:06,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:06,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:42:06,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1725163832, now seen corresponding path program 1 times [2022-11-03 02:42:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:06,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46780681] [2022-11-03 02:42:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:06,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:07,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:07,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46780681] [2022-11-03 02:42:07,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46780681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:07,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:07,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:07,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502069171] [2022-11-03 02:42:07,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:07,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:07,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:07,431 INFO L87 Difference]: Start difference. First operand 141 states and 210 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:09,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:10,007 INFO L93 Difference]: Finished difference Result 360 states and 541 transitions. [2022-11-03 02:42:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:10,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 02:42:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:10,009 INFO L225 Difference]: With dead ends: 360 [2022-11-03 02:42:10,009 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:42:10,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:10,011 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 113 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:10,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 228 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:42:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 02:42:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.5034482758620689) internal successors, (218), 145 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 218 transitions. [2022-11-03 02:42:10,022 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 218 transitions. Word has length 48 [2022-11-03 02:42:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:10,023 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 218 transitions. [2022-11-03 02:42:10,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 218 transitions. [2022-11-03 02:42:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:42:10,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:10,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:42:10,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1845303968, now seen corresponding path program 1 times [2022-11-03 02:42:10,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982826197] [2022-11-03 02:42:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:10,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:10,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982826197] [2022-11-03 02:42:10,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982826197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:10,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:10,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:10,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647736855] [2022-11-03 02:42:10,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:10,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:10,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:10,523 INFO L87 Difference]: Start difference. First operand 146 states and 218 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:12,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:13,098 INFO L93 Difference]: Finished difference Result 365 states and 548 transitions. [2022-11-03 02:42:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 02:42:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:13,107 INFO L225 Difference]: With dead ends: 365 [2022-11-03 02:42:13,108 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:42:13,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:13,109 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 113 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:13,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 227 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:42:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 02:42:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 216 transitions. [2022-11-03 02:42:13,131 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 216 transitions. Word has length 49 [2022-11-03 02:42:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:13,142 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 216 transitions. [2022-11-03 02:42:13,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 216 transitions. [2022-11-03 02:42:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:42:13,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:13,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:13,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:42:13,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash -835115682, now seen corresponding path program 1 times [2022-11-03 02:42:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:13,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903596184] [2022-11-03 02:42:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:13,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:13,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903596184] [2022-11-03 02:42:13,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903596184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:13,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:13,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961956469] [2022-11-03 02:42:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:13,632 INFO L87 Difference]: Start difference. First operand 146 states and 216 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:15,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:16,178 INFO L93 Difference]: Finished difference Result 365 states and 545 transitions. [2022-11-03 02:42:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 02:42:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:16,180 INFO L225 Difference]: With dead ends: 365 [2022-11-03 02:42:16,180 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:42:16,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:16,182 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 115 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:16,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 227 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:42:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 02:42:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4689655172413794) internal successors, (213), 145 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 213 transitions. [2022-11-03 02:42:16,191 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 213 transitions. Word has length 49 [2022-11-03 02:42:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:16,191 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 213 transitions. [2022-11-03 02:42:16,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 213 transitions. [2022-11-03 02:42:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:42:16,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:16,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:42:16,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1738042512, now seen corresponding path program 1 times [2022-11-03 02:42:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508531449] [2022-11-03 02:42:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:16,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508531449] [2022-11-03 02:42:16,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508531449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:16,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:16,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847064216] [2022-11-03 02:42:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:16,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:16,646 INFO L87 Difference]: Start difference. First operand 146 states and 213 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:18,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:19,229 INFO L93 Difference]: Finished difference Result 365 states and 540 transitions. [2022-11-03 02:42:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:42:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:19,231 INFO L225 Difference]: With dead ends: 365 [2022-11-03 02:42:19,231 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:42:19,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:19,232 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 113 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:19,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 227 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:42:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:42:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 02:42:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4482758620689655) internal successors, (210), 145 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 210 transitions. [2022-11-03 02:42:19,242 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 210 transitions. Word has length 50 [2022-11-03 02:42:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:19,242 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 210 transitions. [2022-11-03 02:42:19,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 210 transitions. [2022-11-03 02:42:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:42:19,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:19,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:42:19,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -306048277, now seen corresponding path program 1 times [2022-11-03 02:42:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196083741] [2022-11-03 02:42:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:19,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196083741] [2022-11-03 02:42:19,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196083741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:19,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:19,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:19,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194881811] [2022-11-03 02:42:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:19,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:19,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:19,621 INFO L87 Difference]: Start difference. First operand 146 states and 210 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:21,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:21,991 INFO L93 Difference]: Finished difference Result 312 states and 451 transitions. [2022-11-03 02:42:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:42:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:21,993 INFO L225 Difference]: With dead ends: 312 [2022-11-03 02:42:21,993 INFO L226 Difference]: Without dead ends: 178 [2022-11-03 02:42:21,994 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 [2022-11-03 02:42:21,994 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 16 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:21,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 343 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:42:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-03 02:42:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-11-03 02:42:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.4424242424242424) internal successors, (238), 165 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2022-11-03 02:42:22,004 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 51 [2022-11-03 02:42:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:22,005 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2022-11-03 02:42:22,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2022-11-03 02:42:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:42:22,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:22,006 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:22,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:42:22,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -629140409, now seen corresponding path program 1 times [2022-11-03 02:42:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:22,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753263842] [2022-11-03 02:42:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:22,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:22,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753263842] [2022-11-03 02:42:22,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753263842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:22,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:22,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447813626] [2022-11-03 02:42:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:22,434 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:24,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:25,004 INFO L93 Difference]: Finished difference Result 405 states and 591 transitions. [2022-11-03 02:42:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 02:42:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:25,006 INFO L225 Difference]: With dead ends: 405 [2022-11-03 02:42:25,006 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 02:42:25,007 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 [2022-11-03 02:42:25,007 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 114 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:25,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 248 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 02:42:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 166. [2022-11-03 02:42:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.4242424242424243) internal successors, (235), 165 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 235 transitions. [2022-11-03 02:42:25,017 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 235 transitions. Word has length 61 [2022-11-03 02:42:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:25,018 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 235 transitions. [2022-11-03 02:42:25,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 235 transitions. [2022-11-03 02:42:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:42:25,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:25,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:25,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:42:25,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1699734389, now seen corresponding path program 1 times [2022-11-03 02:42:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250601173] [2022-11-03 02:42:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:42:25,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250601173] [2022-11-03 02:42:25,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250601173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:25,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:25,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:42:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971624152] [2022-11-03 02:42:25,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:25,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:25,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:25,669 INFO L87 Difference]: Start difference. First operand 166 states and 235 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:27,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:28,227 INFO L93 Difference]: Finished difference Result 328 states and 468 transitions. [2022-11-03 02:42:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:42:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-03 02:42:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:28,228 INFO L225 Difference]: With dead ends: 328 [2022-11-03 02:42:28,229 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 02:42:28,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:28,230 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 118 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:28,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 240 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 02:42:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-11-03 02:42:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4127906976744187) internal successors, (243), 172 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 243 transitions. [2022-11-03 02:42:28,239 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 243 transitions. Word has length 62 [2022-11-03 02:42:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:28,239 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 243 transitions. [2022-11-03 02:42:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 243 transitions. [2022-11-03 02:42:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:42:28,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:28,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:28,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:42:28,241 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2107893844, now seen corresponding path program 1 times [2022-11-03 02:42:28,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:28,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332175242] [2022-11-03 02:42:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:28,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332175242] [2022-11-03 02:42:28,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332175242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:28,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:28,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332912847] [2022-11-03 02:42:28,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:28,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:28,703 INFO L87 Difference]: Start difference. First operand 173 states and 243 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:30,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:31,229 INFO L93 Difference]: Finished difference Result 411 states and 591 transitions. [2022-11-03 02:42:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:42:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:31,231 INFO L225 Difference]: With dead ends: 411 [2022-11-03 02:42:31,231 INFO L226 Difference]: Without dead ends: 250 [2022-11-03 02:42:31,232 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 [2022-11-03 02:42:31,235 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 108 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:31,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 262 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-03 02:42:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 173. [2022-11-03 02:42:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.3953488372093024) internal successors, (240), 172 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 240 transitions. [2022-11-03 02:42:31,250 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 240 transitions. Word has length 63 [2022-11-03 02:42:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:31,253 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 240 transitions. [2022-11-03 02:42:31,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 240 transitions. [2022-11-03 02:42:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:42:31,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:31,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:31,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:42:31,260 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash -965958881, now seen corresponding path program 1 times [2022-11-03 02:42:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:31,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397052292] [2022-11-03 02:42:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:32,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:32,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397052292] [2022-11-03 02:42:32,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397052292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:32,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:32,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522342489] [2022-11-03 02:42:32,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:32,238 INFO L87 Difference]: Start difference. First operand 173 states and 240 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:34,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:34,825 INFO L93 Difference]: Finished difference Result 427 states and 604 transitions. [2022-11-03 02:42:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-03 02:42:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:34,827 INFO L225 Difference]: With dead ends: 427 [2022-11-03 02:42:34,827 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 02:42:34,828 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 [2022-11-03 02:42:34,828 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 80 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:34,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 264 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 02:42:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2022-11-03 02:42:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.4354066985645932) internal successors, (300), 209 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 300 transitions. [2022-11-03 02:42:34,842 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 300 transitions. Word has length 69 [2022-11-03 02:42:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:34,842 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 300 transitions. [2022-11-03 02:42:34,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 300 transitions. [2022-11-03 02:42:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:42:34,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:34,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:34,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:42:34,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -82362994, now seen corresponding path program 1 times [2022-11-03 02:42:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:34,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119130468] [2022-11-03 02:42:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:35,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119130468] [2022-11-03 02:42:35,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119130468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:35,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:35,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636370485] [2022-11-03 02:42:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:35,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:35,811 INFO L87 Difference]: Start difference. First operand 210 states and 300 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:37,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:38,386 INFO L93 Difference]: Finished difference Result 485 states and 705 transitions. [2022-11-03 02:42:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-03 02:42:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:38,389 INFO L225 Difference]: With dead ends: 485 [2022-11-03 02:42:38,389 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:42:38,389 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 [2022-11-03 02:42:38,390 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 79 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:38,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 278 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:42:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 232. [2022-11-03 02:42:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.4848484848484849) internal successors, (343), 231 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 343 transitions. [2022-11-03 02:42:38,405 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 343 transitions. Word has length 70 [2022-11-03 02:42:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:38,406 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 343 transitions. [2022-11-03 02:42:38,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 343 transitions. [2022-11-03 02:42:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 02:42:38,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:38,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:38,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:42:38,408 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1017731503, now seen corresponding path program 1 times [2022-11-03 02:42:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:38,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000755597] [2022-11-03 02:42:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:39,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:39,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000755597] [2022-11-03 02:42:39,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000755597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:39,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:39,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:42:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563255511] [2022-11-03 02:42:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:39,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:39,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:39,375 INFO L87 Difference]: Start difference. First operand 232 states and 343 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:41,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:42,023 INFO L93 Difference]: Finished difference Result 579 states and 865 transitions. [2022-11-03 02:42:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-11-03 02:42:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:42,027 INFO L225 Difference]: With dead ends: 579 [2022-11-03 02:42:42,027 INFO L226 Difference]: Without dead ends: 359 [2022-11-03 02:42:42,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:42,028 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 194 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:42,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 269 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:42:42,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-03 02:42:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 292. [2022-11-03 02:42:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.4948453608247423) internal successors, (435), 291 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 435 transitions. [2022-11-03 02:42:42,048 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 435 transitions. Word has length 97 [2022-11-03 02:42:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:42,048 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 435 transitions. [2022-11-03 02:42:42,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 435 transitions. [2022-11-03 02:42:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:42:42,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:42,050 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:42,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:42:42,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash -113999700, now seen corresponding path program 1 times [2022-11-03 02:42:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:42,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8066375] [2022-11-03 02:42:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:42,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:42,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:42,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8066375] [2022-11-03 02:42:42,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8066375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:42,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:42,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:42:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751382911] [2022-11-03 02:42:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:42,918 INFO L87 Difference]: Start difference. First operand 292 states and 435 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:44,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:45,653 INFO L93 Difference]: Finished difference Result 648 states and 967 transitions. [2022-11-03 02:42:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:42:45,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 02:42:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:45,656 INFO L225 Difference]: With dead ends: 648 [2022-11-03 02:42:45,657 INFO L226 Difference]: Without dead ends: 368 [2022-11-03 02:42:45,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:42:45,658 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 125 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:45,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 397 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 338 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:42:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-03 02:42:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 327. [2022-11-03 02:42:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.5030674846625767) internal successors, (490), 326 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 490 transitions. [2022-11-03 02:42:45,711 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 490 transitions. Word has length 102 [2022-11-03 02:42:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:45,712 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 490 transitions. [2022-11-03 02:42:45,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 490 transitions. [2022-11-03 02:42:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:42:45,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:45,714 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:42:45,714 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1256803517, now seen corresponding path program 1 times [2022-11-03 02:42:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:45,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695125505] [2022-11-03 02:42:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:46,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695125505] [2022-11-03 02:42:46,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695125505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:46,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:46,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027688867] [2022-11-03 02:42:46,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:46,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:46,521 INFO L87 Difference]: Start difference. First operand 327 states and 490 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:48,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:49,060 INFO L93 Difference]: Finished difference Result 697 states and 1041 transitions. [2022-11-03 02:42:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:49,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-03 02:42:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:49,062 INFO L225 Difference]: With dead ends: 697 [2022-11-03 02:42:49,062 INFO L226 Difference]: Without dead ends: 382 [2022-11-03 02:42:49,063 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 [2022-11-03 02:42:49,064 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 80 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:49,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 264 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-03 02:42:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 327. [2022-11-03 02:42:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.4969325153374233) internal successors, (488), 326 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 488 transitions. [2022-11-03 02:42:49,084 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 488 transitions. Word has length 103 [2022-11-03 02:42:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:49,085 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 488 transitions. [2022-11-03 02:42:49,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 488 transitions. [2022-11-03 02:42:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:42:49,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:49,087 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:49,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:42:49,087 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1502508142, now seen corresponding path program 1 times [2022-11-03 02:42:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:49,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751121683] [2022-11-03 02:42:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:49,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:49,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751121683] [2022-11-03 02:42:49,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751121683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:49,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:49,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:42:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893183014] [2022-11-03 02:42:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:49,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:49,952 INFO L87 Difference]: Start difference. First operand 327 states and 488 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:51,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:52,559 INFO L93 Difference]: Finished difference Result 676 states and 1007 transitions. [2022-11-03 02:42:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:42:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 02:42:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:52,561 INFO L225 Difference]: With dead ends: 676 [2022-11-03 02:42:52,561 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 02:42:52,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:42:52,563 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 133 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:52,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 403 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:42:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 02:42:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 331. [2022-11-03 02:42:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.490909090909091) internal successors, (492), 330 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 492 transitions. [2022-11-03 02:42:52,583 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 492 transitions. Word has length 108 [2022-11-03 02:42:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:52,583 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 492 transitions. [2022-11-03 02:42:52,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 492 transitions. [2022-11-03 02:42:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:42:52,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:52,585 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:52,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:42:52,586 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:52,586 INFO L85 PathProgramCache]: Analyzing trace with hash 87710986, now seen corresponding path program 1 times [2022-11-03 02:42:52,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:52,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350869168] [2022-11-03 02:42:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:52,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:42:53,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350869168] [2022-11-03 02:42:53,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350869168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:53,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:53,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:53,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548070690] [2022-11-03 02:42:53,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:53,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:53,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:53,130 INFO L87 Difference]: Start difference. First operand 331 states and 492 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:55,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:55,629 INFO L93 Difference]: Finished difference Result 741 states and 1102 transitions. [2022-11-03 02:42:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:55,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-03 02:42:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:55,632 INFO L225 Difference]: With dead ends: 741 [2022-11-03 02:42:55,632 INFO L226 Difference]: Without dead ends: 422 [2022-11-03 02:42:55,633 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 [2022-11-03 02:42:55,634 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 79 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:55,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 280 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-03 02:42:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 366. [2022-11-03 02:42:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.4958904109589042) internal successors, (546), 365 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 546 transitions. [2022-11-03 02:42:55,661 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 546 transitions. Word has length 123 [2022-11-03 02:42:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:55,661 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 546 transitions. [2022-11-03 02:42:55,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 546 transitions. [2022-11-03 02:42:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:42:55,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:55,664 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:42:55,664 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 72058753, now seen corresponding path program 1 times [2022-11-03 02:42:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81896351] [2022-11-03 02:42:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:42:56,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:56,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81896351] [2022-11-03 02:42:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81896351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:56,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872237515] [2022-11-03 02:42:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:56,833 INFO L87 Difference]: Start difference. First operand 366 states and 546 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:58,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:59,372 INFO L93 Difference]: Finished difference Result 813 states and 1211 transitions. [2022-11-03 02:42:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:42:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-03 02:42:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:59,376 INFO L225 Difference]: With dead ends: 813 [2022-11-03 02:42:59,376 INFO L226 Difference]: Without dead ends: 459 [2022-11-03 02:42:59,376 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 [2022-11-03 02:42:59,377 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 87 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:59,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 278 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:42:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-03 02:42:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 394. [2022-11-03 02:42:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.4834605597964376) internal successors, (583), 393 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 583 transitions. [2022-11-03 02:42:59,401 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 583 transitions. Word has length 123 [2022-11-03 02:42:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:59,401 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 583 transitions. [2022-11-03 02:42:59,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 583 transitions. [2022-11-03 02:42:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:42:59,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:59,404 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:42:59,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:42:59,404 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1694907243, now seen corresponding path program 1 times [2022-11-03 02:42:59,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:59,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443948034] [2022-11-03 02:42:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:43:00,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:00,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443948034] [2022-11-03 02:43:00,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443948034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:00,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:00,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102824925] [2022-11-03 02:43:00,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:00,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:00,274 INFO L87 Difference]: Start difference. First operand 394 states and 583 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:02,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:02,828 INFO L93 Difference]: Finished difference Result 831 states and 1227 transitions. [2022-11-03 02:43:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-03 02:43:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:02,831 INFO L225 Difference]: With dead ends: 831 [2022-11-03 02:43:02,831 INFO L226 Difference]: Without dead ends: 449 [2022-11-03 02:43:02,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:02,832 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 195 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:02,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 277 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:43:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-03 02:43:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 394. [2022-11-03 02:43:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.4681933842239185) internal successors, (577), 393 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 577 transitions. [2022-11-03 02:43:02,856 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 577 transitions. Word has length 124 [2022-11-03 02:43:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:02,857 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 577 transitions. [2022-11-03 02:43:02,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 577 transitions. [2022-11-03 02:43:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:43:02,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:02,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 02:43:02,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:43:02,859 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:02,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1192097828, now seen corresponding path program 1 times [2022-11-03 02:43:02,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:02,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332788146] [2022-11-03 02:43:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:43:03,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332788146] [2022-11-03 02:43:03,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332788146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:03,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:03,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824096178] [2022-11-03 02:43:03,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:03,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:03,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:03,649 INFO L87 Difference]: Start difference. First operand 394 states and 577 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:05,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:06,216 INFO L93 Difference]: Finished difference Result 869 states and 1271 transitions. [2022-11-03 02:43:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-11-03 02:43:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:06,220 INFO L225 Difference]: With dead ends: 869 [2022-11-03 02:43:06,220 INFO L226 Difference]: Without dead ends: 487 [2022-11-03 02:43:06,221 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 [2022-11-03 02:43:06,221 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 88 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:06,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 278 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:43:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-03 02:43:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 420. [2022-11-03 02:43:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.4534606205250598) internal successors, (609), 419 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 609 transitions. [2022-11-03 02:43:06,265 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 609 transitions. Word has length 126 [2022-11-03 02:43:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:06,266 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 609 transitions. [2022-11-03 02:43:06,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 609 transitions. [2022-11-03 02:43:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:43:06,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:06,269 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 02:43:06,270 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash -896746662, now seen corresponding path program 1 times [2022-11-03 02:43:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:06,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895063498] [2022-11-03 02:43:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:43:07,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:07,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895063498] [2022-11-03 02:43:07,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895063498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:07,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:07,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:07,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426401793] [2022-11-03 02:43:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:07,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:07,173 INFO L87 Difference]: Start difference. First operand 420 states and 609 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:09,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:09,721 INFO L93 Difference]: Finished difference Result 883 states and 1279 transitions. [2022-11-03 02:43:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-03 02:43:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:09,724 INFO L225 Difference]: With dead ends: 883 [2022-11-03 02:43:09,724 INFO L226 Difference]: Without dead ends: 475 [2022-11-03 02:43:09,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:09,725 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 108 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:09,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 338 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:43:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-03 02:43:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 420. [2022-11-03 02:43:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.4367541766109786) internal successors, (602), 419 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 602 transitions. [2022-11-03 02:43:09,755 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 602 transitions. Word has length 127 [2022-11-03 02:43:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:09,755 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 602 transitions. [2022-11-03 02:43:09,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 602 transitions. [2022-11-03 02:43:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:43:09,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:09,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:09,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 02:43:09,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash 573319536, now seen corresponding path program 1 times [2022-11-03 02:43:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:09,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662430561] [2022-11-03 02:43:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:43:10,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:10,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662430561] [2022-11-03 02:43:10,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662430561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:10,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:10,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:10,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446960347] [2022-11-03 02:43:10,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:10,173 INFO L87 Difference]: Start difference. First operand 420 states and 602 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:12,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:12,651 INFO L93 Difference]: Finished difference Result 921 states and 1319 transitions. [2022-11-03 02:43:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:12,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-03 02:43:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:12,654 INFO L225 Difference]: With dead ends: 921 [2022-11-03 02:43:12,654 INFO L226 Difference]: Without dead ends: 513 [2022-11-03 02:43:12,655 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 [2022-11-03 02:43:12,655 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 71 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:12,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 265 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:43:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-03 02:43:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 461. [2022-11-03 02:43:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 661 transitions. [2022-11-03 02:43:12,687 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 661 transitions. Word has length 129 [2022-11-03 02:43:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:12,687 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 661 transitions. [2022-11-03 02:43:12,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 661 transitions. [2022-11-03 02:43:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:43:12,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:12,689 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:12,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:43:12,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1124466971, now seen corresponding path program 1 times [2022-11-03 02:43:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97679619] [2022-11-03 02:43:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:43:13,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97679619] [2022-11-03 02:43:13,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97679619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:13,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:13,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719418223] [2022-11-03 02:43:13,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:13,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:13,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:13,133 INFO L87 Difference]: Start difference. First operand 461 states and 661 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:15,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:15,645 INFO L93 Difference]: Finished difference Result 965 states and 1383 transitions. [2022-11-03 02:43:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:15,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-03 02:43:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:15,648 INFO L225 Difference]: With dead ends: 965 [2022-11-03 02:43:15,648 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:43:15,649 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 [2022-11-03 02:43:15,650 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 72 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:15,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 264 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:43:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:43:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 463. [2022-11-03 02:43:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.4372294372294372) internal successors, (664), 462 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 664 transitions. [2022-11-03 02:43:15,709 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 664 transitions. Word has length 130 [2022-11-03 02:43:15,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:15,709 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 664 transitions. [2022-11-03 02:43:15,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 664 transitions. [2022-11-03 02:43:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 02:43:15,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:15,711 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:15,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 02:43:15,712 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1780103430, now seen corresponding path program 1 times [2022-11-03 02:43:15,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:15,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246894520] [2022-11-03 02:43:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:15,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:43:16,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246894520] [2022-11-03 02:43:16,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246894520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:16,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:16,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:16,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534376520] [2022-11-03 02:43:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:16,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:16,411 INFO L87 Difference]: Start difference. First operand 463 states and 664 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:18,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:18,908 INFO L93 Difference]: Finished difference Result 1005 states and 1439 transitions. [2022-11-03 02:43:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-03 02:43:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:18,910 INFO L225 Difference]: With dead ends: 1005 [2022-11-03 02:43:18,911 INFO L226 Difference]: Without dead ends: 554 [2022-11-03 02:43:18,911 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 [2022-11-03 02:43:18,912 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 78 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:18,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 266 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:43:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-03 02:43:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 496. [2022-11-03 02:43:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.4282828282828284) internal successors, (707), 495 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 707 transitions. [2022-11-03 02:43:18,947 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 707 transitions. Word has length 133 [2022-11-03 02:43:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:18,948 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 707 transitions. [2022-11-03 02:43:18,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 707 transitions. [2022-11-03 02:43:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:43:18,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:18,950 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:43:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 02:43:18,950 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1870942167, now seen corresponding path program 1 times [2022-11-03 02:43:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792108327] [2022-11-03 02:43:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:43:19,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792108327] [2022-11-03 02:43:19,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792108327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:19,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:19,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:43:19,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918769789] [2022-11-03 02:43:19,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:19,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:19,708 INFO L87 Difference]: Start difference. First operand 496 states and 707 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:21,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:22,273 INFO L93 Difference]: Finished difference Result 998 states and 1423 transitions. [2022-11-03 02:43:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:43:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 02:43:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:22,276 INFO L225 Difference]: With dead ends: 998 [2022-11-03 02:43:22,276 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:43:22,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:22,278 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 73 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:22,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 427 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 308 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:43:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:43:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 496. [2022-11-03 02:43:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.4262626262626263) internal successors, (706), 495 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 706 transitions. [2022-11-03 02:43:22,314 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 706 transitions. Word has length 134 [2022-11-03 02:43:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:22,314 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 706 transitions. [2022-11-03 02:43:22,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 706 transitions. [2022-11-03 02:43:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:43:22,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:22,317 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:22,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 02:43:22,317 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:22,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1539703893, now seen corresponding path program 1 times [2022-11-03 02:43:22,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:22,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751683448] [2022-11-03 02:43:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:22,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751683448] [2022-11-03 02:43:22,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751683448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:22,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551590278] [2022-11-03 02:43:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:22,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:22,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:22,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:22,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:43:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:24,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:43:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:24,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551590278] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:25,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:25,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 10 [2022-11-03 02:43:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970614972] [2022-11-03 02:43:25,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:25,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:25,749 INFO L87 Difference]: Start difference. First operand 496 states and 706 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:27,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:28,374 INFO L93 Difference]: Finished difference Result 2376 states and 3402 transitions. [2022-11-03 02:43:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:28,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-03 02:43:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:28,381 INFO L225 Difference]: With dead ends: 2376 [2022-11-03 02:43:28,381 INFO L226 Difference]: Without dead ends: 1892 [2022-11-03 02:43:28,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:28,389 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 414 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:28,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1120 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:43:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2022-11-03 02:43:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1839. [2022-11-03 02:43:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1838 states have (on average 1.438520130576714) internal successors, (2644), 1838 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2644 transitions. [2022-11-03 02:43:28,555 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2644 transitions. Word has length 147 [2022-11-03 02:43:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:28,556 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2644 transitions. [2022-11-03 02:43:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2644 transitions. [2022-11-03 02:43:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 02:43:28,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:28,560 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2022-11-03 02:43:28,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:28,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 02:43:28,785 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1481296284, now seen corresponding path program 1 times [2022-11-03 02:43:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:28,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914616060] [2022-11-03 02:43:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 02:43:29,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914616060] [2022-11-03 02:43:29,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914616060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:29,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:29,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:43:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836963488] [2022-11-03 02:43:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:29,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:29,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:29,763 INFO L87 Difference]: Start difference. First operand 1839 states and 2644 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:31,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:32,598 INFO L93 Difference]: Finished difference Result 3737 states and 5359 transitions. [2022-11-03 02:43:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:43:32,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-03 02:43:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:32,604 INFO L225 Difference]: With dead ends: 3737 [2022-11-03 02:43:32,604 INFO L226 Difference]: Without dead ends: 1910 [2022-11-03 02:43:32,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:32,606 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 44 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:32,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 513 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:43:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-03 02:43:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1839. [2022-11-03 02:43:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1838 states have (on average 1.4363438520130576) internal successors, (2640), 1838 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2640 transitions. [2022-11-03 02:43:32,742 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2640 transitions. Word has length 151 [2022-11-03 02:43:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:32,742 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2640 transitions. [2022-11-03 02:43:32,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2640 transitions. [2022-11-03 02:43:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 02:43:32,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:32,745 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-03 02:43:32,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 02:43:32,746 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1893377082, now seen corresponding path program 1 times [2022-11-03 02:43:32,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:32,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498568816] [2022-11-03 02:43:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 02:43:34,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:34,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498568816] [2022-11-03 02:43:34,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498568816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:34,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:34,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:34,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875950153] [2022-11-03 02:43:34,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:34,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:34,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:34,137 INFO L87 Difference]: Start difference. First operand 1839 states and 2640 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:36,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:36,792 INFO L93 Difference]: Finished difference Result 3852 states and 5512 transitions. [2022-11-03 02:43:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 02:43:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:36,797 INFO L225 Difference]: With dead ends: 3852 [2022-11-03 02:43:36,797 INFO L226 Difference]: Without dead ends: 2025 [2022-11-03 02:43:36,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:36,799 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 105 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:36,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 340 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:43:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-03 02:43:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1839. [2022-11-03 02:43:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1838 states have (on average 1.4156692056583242) internal successors, (2602), 1838 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2602 transitions. [2022-11-03 02:43:36,939 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2602 transitions. Word has length 152 [2022-11-03 02:43:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:36,940 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2602 transitions. [2022-11-03 02:43:36,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2602 transitions. [2022-11-03 02:43:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:43:36,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:36,943 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:43:36,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-03 02:43:36,943 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -481782649, now seen corresponding path program 1 times [2022-11-03 02:43:36,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:36,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606447388] [2022-11-03 02:43:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:43:37,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:37,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606447388] [2022-11-03 02:43:37,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606447388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:37,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:37,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:37,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014745325] [2022-11-03 02:43:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:37,409 INFO L87 Difference]: Start difference. First operand 1839 states and 2602 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:39,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:40,000 INFO L93 Difference]: Finished difference Result 3852 states and 5436 transitions. [2022-11-03 02:43:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:40,001 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 02:43:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:40,005 INFO L225 Difference]: With dead ends: 3852 [2022-11-03 02:43:40,005 INFO L226 Difference]: Without dead ends: 2025 [2022-11-03 02:43:40,006 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 [2022-11-03 02:43:40,007 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 76 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:40,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 266 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:43:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-03 02:43:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1835. [2022-11-03 02:43:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 1.4083969465648856) internal successors, (2583), 1834 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2583 transitions. [2022-11-03 02:43:40,130 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2583 transitions. Word has length 155 [2022-11-03 02:43:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:40,131 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 2583 transitions. [2022-11-03 02:43:40,131 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2583 transitions. [2022-11-03 02:43:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 02:43:40,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:40,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-03 02:43:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-03 02:43:40,134 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 197736652, now seen corresponding path program 1 times [2022-11-03 02:43:40,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:40,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397388683] [2022-11-03 02:43:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:40,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 02:43:40,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397388683] [2022-11-03 02:43:40,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397388683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:40,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:40,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:43:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102196474] [2022-11-03 02:43:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:40,988 INFO L87 Difference]: Start difference. First operand 1835 states and 2583 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:42,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:43,860 INFO L93 Difference]: Finished difference Result 3725 states and 5233 transitions. [2022-11-03 02:43:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:43:43,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-11-03 02:43:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:43,865 INFO L225 Difference]: With dead ends: 3725 [2022-11-03 02:43:43,865 INFO L226 Difference]: Without dead ends: 1902 [2022-11-03 02:43:43,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:43,867 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 49 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:43,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 513 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:43:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-11-03 02:43:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1835. [2022-11-03 02:43:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 1.4062159214830972) internal successors, (2579), 1834 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2579 transitions. [2022-11-03 02:43:44,002 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2579 transitions. Word has length 164 [2022-11-03 02:43:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:44,002 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 2579 transitions. [2022-11-03 02:43:44,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2579 transitions. [2022-11-03 02:43:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-03 02:43:44,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:44,005 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-03 02:43:44,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-03 02:43:44,006 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash 149315165, now seen corresponding path program 1 times [2022-11-03 02:43:44,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:44,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336969815] [2022-11-03 02:43:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 02:43:44,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336969815] [2022-11-03 02:43:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336969815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:44,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:44,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:44,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965552364] [2022-11-03 02:43:44,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:44,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:44,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:44,672 INFO L87 Difference]: Start difference. First operand 1835 states and 2579 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:46,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:47,252 INFO L93 Difference]: Finished difference Result 3844 states and 5390 transitions. [2022-11-03 02:43:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-11-03 02:43:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:47,259 INFO L225 Difference]: With dead ends: 3844 [2022-11-03 02:43:47,260 INFO L226 Difference]: Without dead ends: 2021 [2022-11-03 02:43:47,262 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 [2022-11-03 02:43:47,262 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 77 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:47,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 272 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:43:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2022-11-03 02:43:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1824. [2022-11-03 02:43:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 1.3960504662643993) internal successors, (2545), 1823 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2545 transitions. [2022-11-03 02:43:47,388 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2545 transitions. Word has length 165 [2022-11-03 02:43:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:47,388 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 2545 transitions. [2022-11-03 02:43:47,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2545 transitions. [2022-11-03 02:43:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 02:43:47,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:47,392 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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] [2022-11-03 02:43:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-03 02:43:47,392 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1846317826, now seen corresponding path program 1 times [2022-11-03 02:43:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:47,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293505799] [2022-11-03 02:43:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:47,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:44:12,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293505799] [2022-11-03 02:44:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293505799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419981001] [2022-11-03 02:44:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:12,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:12,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb2991a-6e1b-4a7f-b88b-78dba3bd05e5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:44:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 181 conjunts are in the unsatisfiable core [2022-11-03 02:44:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates...