./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 16:06:59,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:06:59,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:06:59,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:06:59,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:06:59,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:06:59,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:06:59,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:06:59,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:06:59,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:06:59,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:06:59,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:06:59,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:06:59,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:06:59,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:06:59,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:06:59,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:06:59,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:06:59,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:06:59,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:06:59,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:06:59,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:06:59,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:06:59,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:06:59,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:06:59,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:06:59,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:06:59,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:06:59,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:06:59,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:06:59,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:06:59,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:06:59,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:06:59,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:06:59,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:06:59,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:06:59,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:06:59,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:06:59,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:06:59,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:06:59,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:06:59,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:06:59,384 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:06:59,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:06:59,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:06:59,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:06:59,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:06:59,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:06:59,385 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:06:59,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:06:59,386 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:06:59,386 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:06:59,386 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:06:59,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:06:59,386 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:06:59,386 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:06:59,387 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:06:59,387 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:06:59,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:06:59,387 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:06:59,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:06:59,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:06:59,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:06:59,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:06:59,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:06:59,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:06:59,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:06:59,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:06:59,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:06:59,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:06:59,390 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:06:59,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:06:59,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:06:59,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:06:59,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:06:59,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:06:59,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:06:59,391 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_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 [2022-12-14 16:06:59,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:06:59,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:06:59,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:06:59,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:06:59,601 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:06:59,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2022-12-14 16:07:02,202 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:07:02,415 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:07:02,416 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2022-12-14 16:07:02,426 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/data/f2556ecbc/4bc92b03460b46198ae4b992d47b996f/FLAG132ca9bc1 [2022-12-14 16:07:02,436 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/data/f2556ecbc/4bc92b03460b46198ae4b992d47b996f [2022-12-14 16:07:02,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:07:02,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:07:02,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:07:02,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:07:02,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:07:02,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:07:02" (1/1) ... [2022-12-14 16:07:02,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437cc4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:02, skipping insertion in model container [2022-12-14 16:07:02,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:07:02" (1/1) ... [2022-12-14 16:07:02,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:07:02,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:07:02,906 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2022-12-14 16:07:02,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:07:02,933 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:07:03,161 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2022-12-14 16:07:03,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:07:03,181 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:07:03,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03 WrapperNode [2022-12-14 16:07:03,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:07:03,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:07:03,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:07:03,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:07:03,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,265 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 16:07:03,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:07:03,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:07:03,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:07:03,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:07:03,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:07:03,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:07:03,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:07:03,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:07:03,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (1/1) ... [2022-12-14 16:07:03,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:07:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:03,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:07:03,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:07:03,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:07:03,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:07:03,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:07:03,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:07:03,472 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:07:03,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:07:04,709 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:07:04,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:07:04,932 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 16:07:04,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:07:04 BoogieIcfgContainer [2022-12-14 16:07:04,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:07:04,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:07:04,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:07:04,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:07:04,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:07:02" (1/3) ... [2022-12-14 16:07:04,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdc589a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:07:04, skipping insertion in model container [2022-12-14 16:07:04,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:07:03" (2/3) ... [2022-12-14 16:07:04,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdc589a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:07:04, skipping insertion in model container [2022-12-14 16:07:04,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:07:04" (3/3) ... [2022-12-14 16:07:04,940 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2022-12-14 16:07:04,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:07:04,954 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:07:04,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:07:04,998 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;@7ba69656, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:07:04,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:07:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2022-12-14 16:07:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 16:07:05,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:05,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:05,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1724855493, now seen corresponding path program 1 times [2022-12-14 16:07:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:05,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704091375] [2022-12-14 16:07:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:05,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704091375] [2022-12-14 16:07:05,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704091375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:05,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:05,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:05,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010867778] [2022-12-14 16:07:05,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:05,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:05,713 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-12-14 16:07:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:06,383 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 16:07:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2022-12-14 16:07:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:06,394 INFO L225 Difference]: With dead ends: 440 [2022-12-14 16:07:06,394 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 16:07:06,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:06,398 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:06,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 16:07:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 16:07:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 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) [2022-12-14 16:07:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2022-12-14 16:07:06,439 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2022-12-14 16:07:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:06,439 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2022-12-14 16:07:06,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-12-14 16:07:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2022-12-14 16:07:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 16:07:06,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:06,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:07:06,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1817681626, now seen corresponding path program 1 times [2022-12-14 16:07:06,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:06,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538010317] [2022-12-14 16:07:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:06,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538010317] [2022-12-14 16:07:06,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538010317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:06,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:06,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069580790] [2022-12-14 16:07:06,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:06,582 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-12-14 16:07:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:07,179 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2022-12-14 16:07:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 [2022-12-14 16:07:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:07,183 INFO L225 Difference]: With dead ends: 863 [2022-12-14 16:07:07,184 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 16:07:07,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:07,185 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:07,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 16:07:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 16:07:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7421602787456445) internal successors, (1000), 574 states have internal predecessors, (1000), 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) [2022-12-14 16:07:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2022-12-14 16:07:07,203 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 151 [2022-12-14 16:07:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:07,203 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2022-12-14 16:07:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-12-14 16:07:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2022-12-14 16:07:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 16:07:07,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:07,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 16:07:07,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash 733021885, now seen corresponding path program 1 times [2022-12-14 16:07:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:07,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571230260] [2022-12-14 16:07:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:07:07,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571230260] [2022-12-14 16:07:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571230260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:07,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:07,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:07:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231918423] [2022-12-14 16:07:07,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:07:07,600 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-12-14 16:07:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:08,286 INFO L93 Difference]: Finished difference Result 1290 states and 2262 transitions. [2022-12-14 16:07:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2022-12-14 16:07:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:08,288 INFO L225 Difference]: With dead ends: 1290 [2022-12-14 16:07:08,288 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 16:07:08,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:07:08,290 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 219 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:08,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 11 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 16:07:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 16:07:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 16:07:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.519163763066202) internal successors, (872), 574 states have internal predecessors, (872), 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) [2022-12-14 16:07:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 872 transitions. [2022-12-14 16:07:08,303 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 872 transitions. Word has length 158 [2022-12-14 16:07:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:08,303 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 872 transitions. [2022-12-14 16:07:08,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-12-14 16:07:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 872 transitions. [2022-12-14 16:07:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 16:07:08,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:08,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 16:07:08,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:08,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2058056106, now seen corresponding path program 1 times [2022-12-14 16:07:08,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:08,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560224119] [2022-12-14 16:07:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:08,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560224119] [2022-12-14 16:07:08,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560224119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:08,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:08,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:08,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260277672] [2022-12-14 16:07:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:08,473 INFO L87 Difference]: Start difference. First operand 575 states and 872 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2022-12-14 16:07:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:08,901 INFO L93 Difference]: Finished difference Result 1723 states and 2614 transitions. [2022-12-14 16:07:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:08,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 166 [2022-12-14 16:07:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:08,905 INFO L225 Difference]: With dead ends: 1723 [2022-12-14 16:07:08,905 INFO L226 Difference]: Without dead ends: 1149 [2022-12-14 16:07:08,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:08,907 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:08,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 12 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-12-14 16:07:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-12-14 16:07:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.506108202443281) internal successors, (1726), 1146 states have internal predecessors, (1726), 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) [2022-12-14 16:07:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1726 transitions. [2022-12-14 16:07:08,940 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1726 transitions. Word has length 166 [2022-12-14 16:07:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:08,940 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1726 transitions. [2022-12-14 16:07:08,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2022-12-14 16:07:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1726 transitions. [2022-12-14 16:07:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 16:07:08,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:08,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:08,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 16:07:08,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1145017990, now seen corresponding path program 1 times [2022-12-14 16:07:08,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:08,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763950489] [2022-12-14 16:07:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:08,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:09,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763950489] [2022-12-14 16:07:09,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763950489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:09,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:09,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:09,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804962949] [2022-12-14 16:07:09,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:09,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:09,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:09,081 INFO L87 Difference]: Start difference. First operand 1147 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2022-12-14 16:07:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:09,585 INFO L93 Difference]: Finished difference Result 3437 states and 5175 transitions. [2022-12-14 16:07:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2022-12-14 16:07:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:09,592 INFO L225 Difference]: With dead ends: 3437 [2022-12-14 16:07:09,592 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 16:07:09,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:09,595 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 129 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:09,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 71 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:07:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 16:07:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-12-14 16:07:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4838427947598254) internal successors, (3398), 2290 states have internal predecessors, (3398), 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) [2022-12-14 16:07:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3398 transitions. [2022-12-14 16:07:09,629 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3398 transitions. Word has length 169 [2022-12-14 16:07:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:09,630 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3398 transitions. [2022-12-14 16:07:09,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2022-12-14 16:07:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3398 transitions. [2022-12-14 16:07:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 16:07:09,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:09,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:09,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 16:07:09,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:09,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1836469087, now seen corresponding path program 1 times [2022-12-14 16:07:09,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:09,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837821660] [2022-12-14 16:07:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:09,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:09,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:09,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837821660] [2022-12-14 16:07:09,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837821660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:09,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:09,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829522819] [2022-12-14 16:07:09,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:09,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:09,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:09,890 INFO L87 Difference]: Start difference. First operand 2291 states and 3398 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2022-12-14 16:07:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:10,415 INFO L93 Difference]: Finished difference Result 6869 states and 10191 transitions. [2022-12-14 16:07:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2022-12-14 16:07:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:10,426 INFO L225 Difference]: With dead ends: 6869 [2022-12-14 16:07:10,426 INFO L226 Difference]: Without dead ends: 4579 [2022-12-14 16:07:10,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:10,429 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:10,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 45 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:07:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-12-14 16:07:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2022-12-14 16:07:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 1.452599388379205) internal successors, (6650), 4578 states have internal predecessors, (6650), 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) [2022-12-14 16:07:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6650 transitions. [2022-12-14 16:07:10,491 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6650 transitions. Word has length 171 [2022-12-14 16:07:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:10,491 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 6650 transitions. [2022-12-14 16:07:10,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2022-12-14 16:07:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6650 transitions. [2022-12-14 16:07:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 16:07:10,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:10,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 16:07:10,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 354466876, now seen corresponding path program 1 times [2022-12-14 16:07:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322025483] [2022-12-14 16:07:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 16:07:10,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322025483] [2022-12-14 16:07:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322025483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:10,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:10,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583853215] [2022-12-14 16:07:10,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:10,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:10,661 INFO L87 Difference]: Start difference. First operand 4579 states and 6650 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2022-12-14 16:07:11,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:11,181 INFO L93 Difference]: Finished difference Result 11445 states and 16575 transitions. [2022-12-14 16:07:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 176 [2022-12-14 16:07:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:11,193 INFO L225 Difference]: With dead ends: 11445 [2022-12-14 16:07:11,193 INFO L226 Difference]: Without dead ends: 6867 [2022-12-14 16:07:11,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:11,196 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:11,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 19 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:07:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2022-12-14 16:07:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6867. [2022-12-14 16:07:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 6866 states have (on average 1.431692397320128) internal successors, (9830), 6866 states have internal predecessors, (9830), 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) [2022-12-14 16:07:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 9830 transitions. [2022-12-14 16:07:11,285 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 9830 transitions. Word has length 176 [2022-12-14 16:07:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:11,286 INFO L495 AbstractCegarLoop]: Abstraction has 6867 states and 9830 transitions. [2022-12-14 16:07:11,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2022-12-14 16:07:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 9830 transitions. [2022-12-14 16:07:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 16:07:11,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:11,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 16:07:11,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1881239248, now seen corresponding path program 1 times [2022-12-14 16:07:11,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:11,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725951548] [2022-12-14 16:07:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:07:11,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725951548] [2022-12-14 16:07:11,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725951548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:11,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:11,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:11,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042015659] [2022-12-14 16:07:11,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:11,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:11,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:11,505 INFO L87 Difference]: Start difference. First operand 6867 states and 9830 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2022-12-14 16:07:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:12,096 INFO L93 Difference]: Finished difference Result 19741 states and 28273 transitions. [2022-12-14 16:07:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:12,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 177 [2022-12-14 16:07:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:12,120 INFO L225 Difference]: With dead ends: 19741 [2022-12-14 16:07:12,121 INFO L226 Difference]: Without dead ends: 12875 [2022-12-14 16:07:12,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:12,126 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 128 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:12,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 60 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:07:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2022-12-14 16:07:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12873. [2022-12-14 16:07:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12872 states have (on average 1.4251087632069608) internal successors, (18344), 12872 states have internal predecessors, (18344), 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) [2022-12-14 16:07:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 18344 transitions. [2022-12-14 16:07:12,341 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 18344 transitions. Word has length 177 [2022-12-14 16:07:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:12,341 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 18344 transitions. [2022-12-14 16:07:12,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2022-12-14 16:07:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 18344 transitions. [2022-12-14 16:07:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 16:07:12,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:12,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 16:07:12,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -813754954, now seen corresponding path program 1 times [2022-12-14 16:07:12,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:12,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436026763] [2022-12-14 16:07:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:12,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:12,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436026763] [2022-12-14 16:07:12,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436026763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:12,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:12,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:07:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661459441] [2022-12-14 16:07:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:12,501 INFO L87 Difference]: Start difference. First operand 12873 states and 18344 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2022-12-14 16:07:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:13,024 INFO L93 Difference]: Finished difference Result 28891 states and 41285 transitions. [2022-12-14 16:07:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 178 [2022-12-14 16:07:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:13,046 INFO L225 Difference]: With dead ends: 28891 [2022-12-14 16:07:13,046 INFO L226 Difference]: Without dead ends: 16019 [2022-12-14 16:07:13,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:13,054 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:13,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 212 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2022-12-14 16:07:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 16019. [2022-12-14 16:07:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16019 states, 16018 states have (on average 1.3781370957672618) internal successors, (22075), 16018 states have internal predecessors, (22075), 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) [2022-12-14 16:07:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16019 states to 16019 states and 22075 transitions. [2022-12-14 16:07:13,237 INFO L78 Accepts]: Start accepts. Automaton has 16019 states and 22075 transitions. Word has length 178 [2022-12-14 16:07:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:13,237 INFO L495 AbstractCegarLoop]: Abstraction has 16019 states and 22075 transitions. [2022-12-14 16:07:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2022-12-14 16:07:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16019 states and 22075 transitions. [2022-12-14 16:07:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-14 16:07:13,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:13,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:13,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 16:07:13,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:13,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1381040491, now seen corresponding path program 1 times [2022-12-14 16:07:13,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:13,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178351239] [2022-12-14 16:07:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:13,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 16:07:13,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178351239] [2022-12-14 16:07:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178351239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:13,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:13,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587318964] [2022-12-14 16:07:13,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:13,499 INFO L87 Difference]: Start difference. First operand 16019 states and 22075 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2022-12-14 16:07:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:14,125 INFO L93 Difference]: Finished difference Result 36756 states and 50580 transitions. [2022-12-14 16:07:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 188 [2022-12-14 16:07:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:14,147 INFO L225 Difference]: With dead ends: 36756 [2022-12-14 16:07:14,147 INFO L226 Difference]: Without dead ends: 20738 [2022-12-14 16:07:14,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:14,157 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:14,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 60 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:07:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20738 states. [2022-12-14 16:07:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20738 to 20738. [2022-12-14 16:07:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20738 states, 20737 states have (on average 1.3507739788783335) internal successors, (28011), 20737 states have internal predecessors, (28011), 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) [2022-12-14 16:07:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20738 states to 20738 states and 28011 transitions. [2022-12-14 16:07:14,455 INFO L78 Accepts]: Start accepts. Automaton has 20738 states and 28011 transitions. Word has length 188 [2022-12-14 16:07:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:14,456 INFO L495 AbstractCegarLoop]: Abstraction has 20738 states and 28011 transitions. [2022-12-14 16:07:14,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2022-12-14 16:07:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20738 states and 28011 transitions. [2022-12-14 16:07:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 16:07:14,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:14,465 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:14,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 16:07:14,465 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash -270738584, now seen corresponding path program 1 times [2022-12-14 16:07:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:14,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556632464] [2022-12-14 16:07:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:14,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 16:07:14,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556632464] [2022-12-14 16:07:14,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556632464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761805174] [2022-12-14 16:07:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:14,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:07:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:07:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 16:07:14,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:14,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761805174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:14,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:14,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 16:07:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955566216] [2022-12-14 16:07:14,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:14,964 INFO L87 Difference]: Start difference. First operand 20738 states and 28011 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2022-12-14 16:07:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:15,490 INFO L93 Difference]: Finished difference Result 46909 states and 63897 transitions. [2022-12-14 16:07:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 195 [2022-12-14 16:07:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:15,519 INFO L225 Difference]: With dead ends: 46909 [2022-12-14 16:07:15,519 INFO L226 Difference]: Without dead ends: 26315 [2022-12-14 16:07:15,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:15,531 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:15,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 65 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26315 states. [2022-12-14 16:07:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26315 to 26315. [2022-12-14 16:07:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26315 states, 26314 states have (on average 1.2193889184464544) internal successors, (32087), 26314 states have internal predecessors, (32087), 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) [2022-12-14 16:07:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 32087 transitions. [2022-12-14 16:07:15,796 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 32087 transitions. Word has length 195 [2022-12-14 16:07:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:15,796 INFO L495 AbstractCegarLoop]: Abstraction has 26315 states and 32087 transitions. [2022-12-14 16:07:15,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2022-12-14 16:07:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 32087 transitions. [2022-12-14 16:07:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-14 16:07:15,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:15,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:15,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:07:16,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 16:07:16,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1583364056, now seen corresponding path program 1 times [2022-12-14 16:07:16,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:16,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745564403] [2022-12-14 16:07:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:16,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 16:07:16,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745564403] [2022-12-14 16:07:16,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745564403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:16,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:16,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:16,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704045153] [2022-12-14 16:07:16,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:16,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:16,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:16,444 INFO L87 Difference]: Start difference. First operand 26315 states and 32087 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2022-12-14 16:07:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:17,001 INFO L93 Difference]: Finished difference Result 55920 states and 67922 transitions. [2022-12-14 16:07:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:17,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 205 [2022-12-14 16:07:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:17,028 INFO L225 Difference]: With dead ends: 55920 [2022-12-14 16:07:17,028 INFO L226 Difference]: Without dead ends: 30035 [2022-12-14 16:07:17,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:17,036 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 120 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:17,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 75 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30035 states. [2022-12-14 16:07:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30035 to 30033. [2022-12-14 16:07:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30033 states, 30032 states have (on average 1.2074786893979754) internal successors, (36263), 30032 states have internal predecessors, (36263), 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) [2022-12-14 16:07:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30033 states to 30033 states and 36263 transitions. [2022-12-14 16:07:17,310 INFO L78 Accepts]: Start accepts. Automaton has 30033 states and 36263 transitions. Word has length 205 [2022-12-14 16:07:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:17,311 INFO L495 AbstractCegarLoop]: Abstraction has 30033 states and 36263 transitions. [2022-12-14 16:07:17,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2022-12-14 16:07:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30033 states and 36263 transitions. [2022-12-14 16:07:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-14 16:07:17,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:17,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 16:07:17,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1791339015, now seen corresponding path program 1 times [2022-12-14 16:07:17,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:17,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416773608] [2022-12-14 16:07:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:17,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:17,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:17,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416773608] [2022-12-14 16:07:17,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416773608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:17,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:17,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:07:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811941679] [2022-12-14 16:07:17,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:17,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:17,701 INFO L87 Difference]: Start difference. First operand 30033 states and 36263 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2022-12-14 16:07:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:18,232 INFO L93 Difference]: Finished difference Result 58778 states and 71108 transitions. [2022-12-14 16:07:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 217 [2022-12-14 16:07:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:18,257 INFO L225 Difference]: With dead ends: 58778 [2022-12-14 16:07:18,257 INFO L226 Difference]: Without dead ends: 30176 [2022-12-14 16:07:18,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:18,271 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:18,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30176 states. [2022-12-14 16:07:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30176 to 30176. [2022-12-14 16:07:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30176 states, 30175 states have (on average 1.2066942833471417) internal successors, (36412), 30175 states have internal predecessors, (36412), 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) [2022-12-14 16:07:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30176 states to 30176 states and 36412 transitions. [2022-12-14 16:07:18,590 INFO L78 Accepts]: Start accepts. Automaton has 30176 states and 36412 transitions. Word has length 217 [2022-12-14 16:07:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:18,590 INFO L495 AbstractCegarLoop]: Abstraction has 30176 states and 36412 transitions. [2022-12-14 16:07:18,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2022-12-14 16:07:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 30176 states and 36412 transitions. [2022-12-14 16:07:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-12-14 16:07:18,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:18,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:18,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 16:07:18,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2004384316, now seen corresponding path program 1 times [2022-12-14 16:07:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:18,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29825251] [2022-12-14 16:07:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:07:19,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29825251] [2022-12-14 16:07:19,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29825251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869286772] [2022-12-14 16:07:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:19,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:19,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:19,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:19,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:07:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:07:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:07:19,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869286772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:19,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:19,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185412851] [2022-12-14 16:07:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:19,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:19,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:19,331 INFO L87 Difference]: Start difference. First operand 30176 states and 36412 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) [2022-12-14 16:07:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:19,890 INFO L93 Difference]: Finished difference Result 57634 states and 70236 transitions. [2022-12-14 16:07:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) Word has length 243 [2022-12-14 16:07:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:19,918 INFO L225 Difference]: With dead ends: 57634 [2022-12-14 16:07:19,918 INFO L226 Difference]: Without dead ends: 31749 [2022-12-14 16:07:19,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:19,930 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:19,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 175 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31749 states. [2022-12-14 16:07:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31749 to 31749. [2022-12-14 16:07:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.204233337533073) internal successors, (38232), 31748 states have internal predecessors, (38232), 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) [2022-12-14 16:07:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 38232 transitions. [2022-12-14 16:07:20,295 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 38232 transitions. Word has length 243 [2022-12-14 16:07:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:20,296 INFO L495 AbstractCegarLoop]: Abstraction has 31749 states and 38232 transitions. [2022-12-14 16:07:20,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) [2022-12-14 16:07:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 38232 transitions. [2022-12-14 16:07:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-14 16:07:20,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:20,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:20,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:07:20,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:20,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash -350694319, now seen corresponding path program 1 times [2022-12-14 16:07:20,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:20,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044558179] [2022-12-14 16:07:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:20,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 16:07:20,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044558179] [2022-12-14 16:07:20,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044558179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660576845] [2022-12-14 16:07:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:20,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:20,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:20,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:20,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:07:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:20,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:07:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 16:07:21,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:21,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660576845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:21,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:21,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:21,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660104605] [2022-12-14 16:07:21,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:21,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:21,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:21,065 INFO L87 Difference]: Start difference. First operand 31749 states and 38232 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-12-14 16:07:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:21,601 INFO L93 Difference]: Finished difference Result 67215 states and 81609 transitions. [2022-12-14 16:07:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 252 [2022-12-14 16:07:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:21,633 INFO L225 Difference]: With dead ends: 67215 [2022-12-14 16:07:21,634 INFO L226 Difference]: Without dead ends: 39757 [2022-12-14 16:07:21,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:21,646 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:21,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 205 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:07:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39757 states. [2022-12-14 16:07:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39757 to 39471. [2022-12-14 16:07:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39471 states, 39470 states have (on average 1.1710412971877375) internal successors, (46221), 39470 states have internal predecessors, (46221), 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) [2022-12-14 16:07:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39471 states to 39471 states and 46221 transitions. [2022-12-14 16:07:22,072 INFO L78 Accepts]: Start accepts. Automaton has 39471 states and 46221 transitions. Word has length 252 [2022-12-14 16:07:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:22,073 INFO L495 AbstractCegarLoop]: Abstraction has 39471 states and 46221 transitions. [2022-12-14 16:07:22,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-12-14 16:07:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 39471 states and 46221 transitions. [2022-12-14 16:07:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-12-14 16:07:22,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:22,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:22,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:07:22,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 16:07:22,293 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1076737737, now seen corresponding path program 1 times [2022-12-14 16:07:22,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:22,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561931864] [2022-12-14 16:07:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:22,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 16:07:22,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:22,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561931864] [2022-12-14 16:07:22,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561931864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:22,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172813707] [2022-12-14 16:07:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:22,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:22,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:07:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:07:22,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:07:23,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:23,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172813707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:23,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:23,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837851059] [2022-12-14 16:07:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:23,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:23,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:23,086 INFO L87 Difference]: Start difference. First operand 39471 states and 46221 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-12-14 16:07:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:23,770 INFO L93 Difference]: Finished difference Result 83660 states and 98237 transitions. [2022-12-14 16:07:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 262 [2022-12-14 16:07:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:23,818 INFO L225 Difference]: With dead ends: 83660 [2022-12-14 16:07:23,818 INFO L226 Difference]: Without dead ends: 48623 [2022-12-14 16:07:23,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:23,840 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:23,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48623 states. [2022-12-14 16:07:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48623 to 48623. [2022-12-14 16:07:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48623 states, 48622 states have (on average 1.16996421373041) internal successors, (56886), 48622 states have internal predecessors, (56886), 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) [2022-12-14 16:07:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48623 states to 48623 states and 56886 transitions. [2022-12-14 16:07:24,349 INFO L78 Accepts]: Start accepts. Automaton has 48623 states and 56886 transitions. Word has length 262 [2022-12-14 16:07:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:24,349 INFO L495 AbstractCegarLoop]: Abstraction has 48623 states and 56886 transitions. [2022-12-14 16:07:24,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-12-14 16:07:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 48623 states and 56886 transitions. [2022-12-14 16:07:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 16:07:24,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:24,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:24,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:07:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 16:07:24,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -324618326, now seen corresponding path program 1 times [2022-12-14 16:07:24,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:24,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234995879] [2022-12-14 16:07:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 130 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 16:07:24,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234995879] [2022-12-14 16:07:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234995879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888057881] [2022-12-14 16:07:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:24,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:24,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:24,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:07:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:07:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:07:25,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:25,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888057881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:25,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:25,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094099417] [2022-12-14 16:07:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:25,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:25,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:25,338 INFO L87 Difference]: Start difference. First operand 48623 states and 56886 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-12-14 16:07:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:26,271 INFO L93 Difference]: Finished difference Result 133428 states and 156447 transitions. [2022-12-14 16:07:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 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 271 [2022-12-14 16:07:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:26,348 INFO L225 Difference]: With dead ends: 133428 [2022-12-14 16:07:26,348 INFO L226 Difference]: Without dead ends: 85950 [2022-12-14 16:07:26,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:26,377 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 322 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:26,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 183 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85950 states. [2022-12-14 16:07:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85950 to 82657. [2022-12-14 16:07:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82657 states, 82656 states have (on average 1.1671506000774294) internal successors, (96472), 82656 states have internal predecessors, (96472), 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) [2022-12-14 16:07:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82657 states to 82657 states and 96472 transitions. [2022-12-14 16:07:27,215 INFO L78 Accepts]: Start accepts. Automaton has 82657 states and 96472 transitions. Word has length 271 [2022-12-14 16:07:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:27,216 INFO L495 AbstractCegarLoop]: Abstraction has 82657 states and 96472 transitions. [2022-12-14 16:07:27,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-12-14 16:07:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 82657 states and 96472 transitions. [2022-12-14 16:07:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-12-14 16:07:27,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:27,240 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:27,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 16:07:27,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 16:07:27,442 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash 189256037, now seen corresponding path program 1 times [2022-12-14 16:07:27,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483130559] [2022-12-14 16:07:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-12-14 16:07:27,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483130559] [2022-12-14 16:07:27,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483130559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046174754] [2022-12-14 16:07:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:27,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:27,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:27,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:07:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:28,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:07:28,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 16:07:28,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:28,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046174754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:28,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:28,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:28,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886131096] [2022-12-14 16:07:28,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:28,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:28,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:28,121 INFO L87 Difference]: Start difference. First operand 82657 states and 96472 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) [2022-12-14 16:07:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:29,047 INFO L93 Difference]: Finished difference Result 159021 states and 185894 transitions. [2022-12-14 16:07:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:29,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) Word has length 280 [2022-12-14 16:07:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:29,130 INFO L225 Difference]: With dead ends: 159021 [2022-12-14 16:07:29,130 INFO L226 Difference]: Without dead ends: 77795 [2022-12-14 16:07:29,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:29,169 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 124 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:29,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 205 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77795 states. [2022-12-14 16:07:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77795 to 70359. [2022-12-14 16:07:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70359 states, 70358 states have (on average 1.1391170868984337) internal successors, (80146), 70358 states have internal predecessors, (80146), 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) [2022-12-14 16:07:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70359 states to 70359 states and 80146 transitions. [2022-12-14 16:07:30,209 INFO L78 Accepts]: Start accepts. Automaton has 70359 states and 80146 transitions. Word has length 280 [2022-12-14 16:07:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:30,209 INFO L495 AbstractCegarLoop]: Abstraction has 70359 states and 80146 transitions. [2022-12-14 16:07:30,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) [2022-12-14 16:07:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 70359 states and 80146 transitions. [2022-12-14 16:07:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-12-14 16:07:30,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:30,231 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:30,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 16:07:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:30,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash 400657746, now seen corresponding path program 1 times [2022-12-14 16:07:30,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:30,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690715097] [2022-12-14 16:07:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:30,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-14 16:07:30,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690715097] [2022-12-14 16:07:30,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690715097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002635660] [2022-12-14 16:07:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:30,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:30,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:30,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:07:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:07:30,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-14 16:07:30,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002635660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:30,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:30,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203564252] [2022-12-14 16:07:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:30,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:30,924 INFO L87 Difference]: Start difference. First operand 70359 states and 80146 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 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) [2022-12-14 16:07:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:31,936 INFO L93 Difference]: Finished difference Result 171607 states and 196145 transitions. [2022-12-14 16:07:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 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 282 [2022-12-14 16:07:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:32,037 INFO L225 Difference]: With dead ends: 171607 [2022-12-14 16:07:32,037 INFO L226 Difference]: Without dead ends: 101535 [2022-12-14 16:07:32,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:32,073 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 335 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:32,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 252 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101535 states. [2022-12-14 16:07:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101535 to 101533. [2022-12-14 16:07:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101533 states, 101532 states have (on average 1.1405172753417643) internal successors, (115799), 101532 states have internal predecessors, (115799), 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) [2022-12-14 16:07:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101533 states to 101533 states and 115799 transitions. [2022-12-14 16:07:33,286 INFO L78 Accepts]: Start accepts. Automaton has 101533 states and 115799 transitions. Word has length 282 [2022-12-14 16:07:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:33,286 INFO L495 AbstractCegarLoop]: Abstraction has 101533 states and 115799 transitions. [2022-12-14 16:07:33,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 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) [2022-12-14 16:07:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 101533 states and 115799 transitions. [2022-12-14 16:07:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-12-14 16:07:33,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:33,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:33,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 16:07:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:33,511 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 272861602, now seen corresponding path program 1 times [2022-12-14 16:07:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181546663] [2022-12-14 16:07:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:07:33,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:33,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181546663] [2022-12-14 16:07:33,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181546663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:33,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623112130] [2022-12-14 16:07:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:33,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:33,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:33,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:33,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 16:07:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:07:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:07:34,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:34,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623112130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:34,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:34,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-14 16:07:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507108061] [2022-12-14 16:07:34,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:34,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:34,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:34,303 INFO L87 Difference]: Start difference. First operand 101533 states and 115799 transitions. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 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) [2022-12-14 16:07:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:35,338 INFO L93 Difference]: Finished difference Result 207927 states and 237048 transitions. [2022-12-14 16:07:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 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 299 [2022-12-14 16:07:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:35,454 INFO L225 Difference]: With dead ends: 207927 [2022-12-14 16:07:35,454 INFO L226 Difference]: Without dead ends: 107110 [2022-12-14 16:07:35,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:35,499 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 158 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:35,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 177 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107110 states. [2022-12-14 16:07:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107110 to 107110. [2022-12-14 16:07:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107110 states, 107109 states have (on average 1.133266112091421) internal successors, (121383), 107109 states have internal predecessors, (121383), 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) [2022-12-14 16:07:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107110 states to 107110 states and 121383 transitions. [2022-12-14 16:07:37,098 INFO L78 Accepts]: Start accepts. Automaton has 107110 states and 121383 transitions. Word has length 299 [2022-12-14 16:07:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:37,099 INFO L495 AbstractCegarLoop]: Abstraction has 107110 states and 121383 transitions. [2022-12-14 16:07:37,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 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) [2022-12-14 16:07:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 107110 states and 121383 transitions. [2022-12-14 16:07:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-12-14 16:07:37,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:37,134 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:37,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 16:07:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:37,337 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1049746341, now seen corresponding path program 1 times [2022-12-14 16:07:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:37,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102826517] [2022-12-14 16:07:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 221 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 16:07:37,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:37,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102826517] [2022-12-14 16:07:37,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102826517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:37,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132291288] [2022-12-14 16:07:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:37,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:37,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:37,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:37,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 16:07:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:07:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:07:38,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:38,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132291288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:38,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 16:07:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168393409] [2022-12-14 16:07:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:38,142 INFO L87 Difference]: Start difference. First operand 107110 states and 121383 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-12-14 16:07:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:39,259 INFO L93 Difference]: Finished difference Result 215935 states and 244790 transitions. [2022-12-14 16:07:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 318 [2022-12-14 16:07:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:39,382 INFO L225 Difference]: With dead ends: 215935 [2022-12-14 16:07:39,383 INFO L226 Difference]: Without dead ends: 113688 [2022-12-14 16:07:39,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:39,433 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:39,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 184 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113688 states. [2022-12-14 16:07:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113688 to 108683. [2022-12-14 16:07:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108683 states, 108682 states have (on average 1.1303895769308625) internal successors, (122853), 108682 states have internal predecessors, (122853), 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) [2022-12-14 16:07:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108683 states to 108683 states and 122853 transitions. [2022-12-14 16:07:40,744 INFO L78 Accepts]: Start accepts. Automaton has 108683 states and 122853 transitions. Word has length 318 [2022-12-14 16:07:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:40,745 INFO L495 AbstractCegarLoop]: Abstraction has 108683 states and 122853 transitions. [2022-12-14 16:07:40,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-12-14 16:07:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 108683 states and 122853 transitions. [2022-12-14 16:07:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-12-14 16:07:40,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:40,769 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:40,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 16:07:40,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 16:07:40,971 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash -96209338, now seen corresponding path program 1 times [2022-12-14 16:07:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410702594] [2022-12-14 16:07:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 189 proven. 3 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 16:07:41,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410702594] [2022-12-14 16:07:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410702594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245273347] [2022-12-14 16:07:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:41,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:41,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 16:07:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:07:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 16:07:41,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245273347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 16:07:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233696007] [2022-12-14 16:07:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:41,594 INFO L87 Difference]: Start difference. First operand 108683 states and 122853 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2022-12-14 16:07:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:42,520 INFO L93 Difference]: Finished difference Result 212360 states and 240245 transitions. [2022-12-14 16:07:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 324 [2022-12-14 16:07:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:42,782 INFO L225 Difference]: With dead ends: 212360 [2022-12-14 16:07:42,783 INFO L226 Difference]: Without dead ends: 96528 [2022-12-14 16:07:42,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:07:42,820 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 116 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:42,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 216 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:07:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96528 states. [2022-12-14 16:07:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96528 to 79797. [2022-12-14 16:07:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79797 states, 79796 states have (on average 1.1302571557471552) internal successors, (90190), 79796 states have internal predecessors, (90190), 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) [2022-12-14 16:07:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79797 states to 79797 states and 90190 transitions. [2022-12-14 16:07:44,022 INFO L78 Accepts]: Start accepts. Automaton has 79797 states and 90190 transitions. Word has length 324 [2022-12-14 16:07:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:44,022 INFO L495 AbstractCegarLoop]: Abstraction has 79797 states and 90190 transitions. [2022-12-14 16:07:44,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2022-12-14 16:07:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 79797 states and 90190 transitions. [2022-12-14 16:07:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-12-14 16:07:44,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:44,043 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:44,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 16:07:44,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 16:07:44,245 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash 479781447, now seen corresponding path program 1 times [2022-12-14 16:07:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:44,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187626918] [2022-12-14 16:07:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-14 16:07:44,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:44,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187626918] [2022-12-14 16:07:44,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187626918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:44,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:44,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:07:44,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250282080] [2022-12-14 16:07:44,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:07:44,637 INFO L87 Difference]: Start difference. First operand 79797 states and 90190 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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) [2022-12-14 16:07:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:45,755 INFO L93 Difference]: Finished difference Result 156590 states and 177172 transitions. [2022-12-14 16:07:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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 327 [2022-12-14 16:07:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:45,824 INFO L225 Difference]: With dead ends: 156590 [2022-12-14 16:07:45,825 INFO L226 Difference]: Without dead ends: 79225 [2022-12-14 16:07:45,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:07:45,854 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 231 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:45,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 38 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:07:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79225 states. [2022-12-14 16:07:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79225 to 78653. [2022-12-14 16:07:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78653 states, 78652 states have (on average 1.1303717642272288) internal successors, (88906), 78652 states have internal predecessors, (88906), 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) [2022-12-14 16:07:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78653 states to 78653 states and 88906 transitions. [2022-12-14 16:07:46,775 INFO L78 Accepts]: Start accepts. Automaton has 78653 states and 88906 transitions. Word has length 327 [2022-12-14 16:07:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:46,775 INFO L495 AbstractCegarLoop]: Abstraction has 78653 states and 88906 transitions. [2022-12-14 16:07:46,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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) [2022-12-14 16:07:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 78653 states and 88906 transitions. [2022-12-14 16:07:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-12-14 16:07:46,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:46,786 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 16:07:46,786 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1219460898, now seen corresponding path program 1 times [2022-12-14 16:07:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924449299] [2022-12-14 16:07:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 198 proven. 3 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-12-14 16:07:47,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:47,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924449299] [2022-12-14 16:07:47,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924449299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:47,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006689371] [2022-12-14 16:07:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:47,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:47,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:47,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 16:07:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:47,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:07:47,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 16:07:47,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:07:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006689371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:47,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:07:47,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-14 16:07:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750361519] [2022-12-14 16:07:47,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:47,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:47,446 INFO L87 Difference]: Start difference. First operand 78653 states and 88906 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2022-12-14 16:07:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:48,586 INFO L93 Difference]: Finished difference Result 155446 states and 175936 transitions. [2022-12-14 16:07:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 330 [2022-12-14 16:07:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:48,657 INFO L225 Difference]: With dead ends: 155446 [2022-12-14 16:07:48,657 INFO L226 Difference]: Without dead ends: 77652 [2022-12-14 16:07:48,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:07:48,693 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 394 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:48,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 52 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 16:07:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77652 states. [2022-12-14 16:07:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77652 to 71217. [2022-12-14 16:07:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71217 states, 71216 states have (on average 1.1087957762300606) internal successors, (78964), 71216 states have internal predecessors, (78964), 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) [2022-12-14 16:07:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71217 states to 71217 states and 78964 transitions. [2022-12-14 16:07:49,540 INFO L78 Accepts]: Start accepts. Automaton has 71217 states and 78964 transitions. Word has length 330 [2022-12-14 16:07:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:49,540 INFO L495 AbstractCegarLoop]: Abstraction has 71217 states and 78964 transitions. [2022-12-14 16:07:49,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2022-12-14 16:07:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 71217 states and 78964 transitions. [2022-12-14 16:07:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-12-14 16:07:49,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:49,553 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:49,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 16:07:49,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 16:07:49,755 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash -331510631, now seen corresponding path program 1 times [2022-12-14 16:07:49,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284995774] [2022-12-14 16:07:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:49,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 16:07:50,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:50,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284995774] [2022-12-14 16:07:50,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284995774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:50,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:50,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:07:50,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908046398] [2022-12-14 16:07:50,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:50,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:07:50,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:07:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:07:50,029 INFO L87 Difference]: Start difference. First operand 71217 states and 78964 transitions. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 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) [2022-12-14 16:07:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:51,159 INFO L93 Difference]: Finished difference Result 142435 states and 157918 transitions. [2022-12-14 16:07:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:07:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 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 333 [2022-12-14 16:07:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:51,216 INFO L225 Difference]: With dead ends: 142435 [2022-12-14 16:07:51,216 INFO L226 Difference]: Without dead ends: 71791 [2022-12-14 16:07:51,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:07:51,237 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 198 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:51,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 170 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:07:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71791 states. [2022-12-14 16:07:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71791 to 66212. [2022-12-14 16:07:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66212 states, 66211 states have (on average 1.1121414870640831) internal successors, (73636), 66211 states have internal predecessors, (73636), 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) [2022-12-14 16:07:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66212 states to 66212 states and 73636 transitions. [2022-12-14 16:07:51,915 INFO L78 Accepts]: Start accepts. Automaton has 66212 states and 73636 transitions. Word has length 333 [2022-12-14 16:07:51,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:51,916 INFO L495 AbstractCegarLoop]: Abstraction has 66212 states and 73636 transitions. [2022-12-14 16:07:51,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 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) [2022-12-14 16:07:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 66212 states and 73636 transitions. [2022-12-14 16:07:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-12-14 16:07:51,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:51,928 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 16:07:51,928 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -967371363, now seen corresponding path program 1 times [2022-12-14 16:07:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929514863] [2022-12-14 16:07:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 16:07:52,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929514863] [2022-12-14 16:07:52,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929514863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:07:52,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:07:52,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:07:52,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511789607] [2022-12-14 16:07:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:07:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:07:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:07:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:07:52,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:52,100 INFO L87 Difference]: Start difference. First operand 66212 states and 73636 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2022-12-14 16:07:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:07:52,767 INFO L93 Difference]: Finished difference Result 135998 states and 151446 transitions. [2022-12-14 16:07:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:07:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 334 [2022-12-14 16:07:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:07:52,829 INFO L225 Difference]: With dead ends: 135998 [2022-12-14 16:07:52,829 INFO L226 Difference]: Without dead ends: 70359 [2022-12-14 16:07:52,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:07:52,857 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:07:52,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 55 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:07:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70359 states. [2022-12-14 16:07:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70359 to 67213. [2022-12-14 16:07:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67213 states, 67212 states have (on average 1.1078825209783967) internal successors, (74463), 67212 states have internal predecessors, (74463), 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) [2022-12-14 16:07:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67213 states to 67213 states and 74463 transitions. [2022-12-14 16:07:53,958 INFO L78 Accepts]: Start accepts. Automaton has 67213 states and 74463 transitions. Word has length 334 [2022-12-14 16:07:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:53,958 INFO L495 AbstractCegarLoop]: Abstraction has 67213 states and 74463 transitions. [2022-12-14 16:07:53,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2022-12-14 16:07:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 67213 states and 74463 transitions. [2022-12-14 16:07:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-12-14 16:07:53,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:07:53,977 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:07:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 16:07:53,977 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:07:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:07:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1269467072, now seen corresponding path program 1 times [2022-12-14 16:07:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:07:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23251564] [2022-12-14 16:07:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:07:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 204 proven. 74 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 16:07:54,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:07:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23251564] [2022-12-14 16:07:54,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23251564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:07:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503356654] [2022-12-14 16:07:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:07:54,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:07:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:07:54,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:07:54,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fa50f44-3fee-41f0-a897-09b224369015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 16:07:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:07:54,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:07:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:07:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 238 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:07:54,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:07:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 238 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:07:54,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503356654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:07:54,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572055227] [2022-12-14 16:07:54,946 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 16:07:54,946 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:07:54,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:07:54,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:07:54,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs