./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label42.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_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/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_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/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_9e919797-b6de-4579-8b8a-b141a0e9dda2/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 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f --- 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 13:17:05,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:17:05,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:17:05,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:17:05,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:17:05,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:17:05,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:17:05,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:17:05,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:17:05,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:17:05,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:17:05,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:17:05,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:17:05,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:17:05,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:17:05,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:17:05,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:17:05,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:17:05,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:17:05,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:17:05,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:17:05,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:17:05,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:17:05,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:17:05,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:17:05,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:17:05,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:17:05,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:17:05,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:17:05,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:17:05,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:17:05,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:17:05,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:17:05,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:17:05,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:17:05,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:17:05,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:17:05,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:17:05,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:17:05,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:17:05,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:17:05,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:17:05,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:17:05,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:17:05,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:17:05,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:17:05,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:17:05,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:17:05,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:17:05,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:17:05,451 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:17:05,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:17:05,451 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:17:05,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:17:05,451 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:17:05,451 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:17:05,452 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:17:05,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:17:05,452 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:17:05,452 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:17:05,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:17:05,453 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:17:05,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:17:05,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:17:05,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:17:05,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:17:05,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:17:05,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:17:05,454 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:17:05,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:17:05,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:17:05,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:17:05,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:17:05,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:17:05,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:17:05,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:17:05,456 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:17:05,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:17:05,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:17:05,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:17:05,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:17:05,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:17:05,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:17:05,457 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_9e919797-b6de-4579-8b8a-b141a0e9dda2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f [2022-12-14 13:17:05,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:17:05,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:17:05,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:17:05,695 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:17:05,695 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:17:05,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2022-12-14 13:17:08,299 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:17:08,515 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:17:08,516 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2022-12-14 13:17:08,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/data/ea64b12b1/aa19303ff84c45d38d11b720e2b41248/FLAG4739defe6 [2022-12-14 13:17:08,536 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/data/ea64b12b1/aa19303ff84c45d38d11b720e2b41248 [2022-12-14 13:17:08,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:17:08,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:17:08,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:17:08,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:17:08,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:17:08,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:08" (1/1) ... [2022-12-14 13:17:08,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfadcb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:08, skipping insertion in model container [2022-12-14 13:17:08,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:17:08" (1/1) ... [2022-12-14 13:17:08,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:17:08,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:17:09,008 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_9e919797-b6de-4579-8b8a-b141a0e9dda2/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2022-12-14 13:17:09,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:17:09,040 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:17:09,239 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_9e919797-b6de-4579-8b8a-b141a0e9dda2/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2022-12-14 13:17:09,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:17:09,257 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:17:09,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09 WrapperNode [2022-12-14 13:17:09,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:17:09,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:17:09,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:17:09,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:17:09,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,350 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 13:17:09,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:17:09,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:17:09,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:17:09,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:17:09,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:17:09,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:17:09,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:17:09,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:17:09,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (1/1) ... [2022-12-14 13:17:09,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:17:09,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:17:09,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:17:09,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:17:09,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:17:09,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:17:09,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:17:09,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:17:09,542 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:17:09,544 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:17:10,835 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:17:11,004 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:17:11,004 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:17:11,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:11 BoogieIcfgContainer [2022-12-14 13:17:11,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:17:11,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:17:11,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:17:11,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:17:11,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:17:08" (1/3) ... [2022-12-14 13:17:11,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c6836e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:11, skipping insertion in model container [2022-12-14 13:17:11,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:17:09" (2/3) ... [2022-12-14 13:17:11,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c6836e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:17:11, skipping insertion in model container [2022-12-14 13:17:11,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:17:11" (3/3) ... [2022-12-14 13:17:11,012 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label42.c [2022-12-14 13:17:11,025 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:17:11,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:17:11,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:17:11,067 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;@223dfab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:17:11,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:17:11,071 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 13:17:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 13:17:11,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:11,083 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 13:17:11,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1724853189, now seen corresponding path program 1 times [2022-12-14 13:17:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:11,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228972725] [2022-12-14 13:17:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:11,740 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 13:17:11,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228972725] [2022-12-14 13:17:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228972725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:11,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:11,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384226917] [2022-12-14 13:17:11,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:11,771 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 13:17:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:12,506 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 13:17:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:12,508 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 13:17:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:12,516 INFO L225 Difference]: With dead ends: 440 [2022-12-14 13:17:12,516 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 13:17:12,519 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 13:17:12,521 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:12,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:17:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 13:17:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 13:17:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 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 13:17:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2022-12-14 13:17:12,560 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2022-12-14 13:17:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:12,560 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2022-12-14 13:17:12,561 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 13:17:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2022-12-14 13:17:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:17:12,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:12,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:17:12,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2023686353, now seen corresponding path program 1 times [2022-12-14 13:17:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:12,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738160273] [2022-12-14 13:17:12,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:12,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:12,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:12,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738160273] [2022-12-14 13:17:12,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738160273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:12,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:12,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996503726] [2022-12-14 13:17:12,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:12,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:12,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:12,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:12,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:12,848 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:17:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:13,430 INFO L93 Difference]: Finished difference Result 865 states and 1561 transitions. [2022-12-14 13:17:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-12-14 13:17:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:13,433 INFO L225 Difference]: With dead ends: 865 [2022-12-14 13:17:13,433 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 13:17:13,434 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 13:17:13,435 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 179 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:13,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 57 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:17:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 13:17:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-12-14 13:17:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7822299651567943) internal successors, (1023), 574 states have internal predecessors, (1023), 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 13:17:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1023 transitions. [2022-12-14 13:17:13,469 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1023 transitions. Word has length 147 [2022-12-14 13:17:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:13,470 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1023 transitions. [2022-12-14 13:17:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:17:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1023 transitions. [2022-12-14 13:17:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 13:17:13,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:13,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:13,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:17:13,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1961373550, now seen corresponding path program 1 times [2022-12-14 13:17:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:13,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893087299] [2022-12-14 13:17:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:13,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893087299] [2022-12-14 13:17:13,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893087299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:17:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543113792] [2022-12-14 13:17:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:13,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:17:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:17:13,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:17:13,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:17:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:17:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:17:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:17:14,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:17:14,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543113792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:14,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:17:14,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 13:17:14,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928872772] [2022-12-14 13:17:14,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:17:14,076 INFO L87 Difference]: Start difference. First operand 575 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 13:17:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:14,717 INFO L93 Difference]: Finished difference Result 1721 states and 3066 transitions. [2022-12-14 13:17:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 154 [2022-12-14 13:17:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:14,723 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 13:17:14,724 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 13:17:14,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 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 13:17:14,725 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:14,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:17:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 13:17:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 13:17:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7321116928446771) internal successors, (1985), 1146 states have internal predecessors, (1985), 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 13:17:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1985 transitions. [2022-12-14 13:17:14,745 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1985 transitions. Word has length 154 [2022-12-14 13:17:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:14,745 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1985 transitions. [2022-12-14 13:17:14,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 13:17:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1985 transitions. [2022-12-14 13:17:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 13:17:14,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:14,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:14,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:17:14,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:17:14,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash 649505199, now seen corresponding path program 1 times [2022-12-14 13:17:14,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:14,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694220248] [2022-12-14 13:17:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:15,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:15,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694220248] [2022-12-14 13:17:15,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694220248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:15,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:15,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872768754] [2022-12-14 13:17:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:15,094 INFO L87 Difference]: Start difference. First operand 1147 states and 1985 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 13:17:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:15,704 INFO L93 Difference]: Finished difference Result 3439 states and 5953 transitions. [2022-12-14 13:17:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 156 [2022-12-14 13:17:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:15,709 INFO L225 Difference]: With dead ends: 3439 [2022-12-14 13:17:15,710 INFO L226 Difference]: Without dead ends: 2293 [2022-12-14 13:17:15,711 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 13:17:15,712 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 158 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:15,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 48 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:17:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-12-14 13:17:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1719. [2022-12-14 13:17:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.6530849825378346) internal successors, (2840), 1718 states have internal predecessors, (2840), 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 13:17:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2840 transitions. [2022-12-14 13:17:15,744 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2840 transitions. Word has length 156 [2022-12-14 13:17:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:15,745 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2840 transitions. [2022-12-14 13:17:15,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 13:17:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2840 transitions. [2022-12-14 13:17:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 13:17:15,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:15,750 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-12-14 13:17:15,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:17:15,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1897743812, now seen corresponding path program 1 times [2022-12-14 13:17:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:15,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010876060] [2022-12-14 13:17:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:15,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:15,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010876060] [2022-12-14 13:17:15,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010876060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:15,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:15,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:15,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887241732] [2022-12-14 13:17:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:15,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:15,951 INFO L87 Difference]: Start difference. First operand 1719 states and 2840 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 13:17:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:16,549 INFO L93 Difference]: Finished difference Result 4295 states and 7205 transitions. [2022-12-14 13:17:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 161 [2022-12-14 13:17:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:16,554 INFO L225 Difference]: With dead ends: 4295 [2022-12-14 13:17:16,555 INFO L226 Difference]: Without dead ends: 2577 [2022-12-14 13:17:16,556 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 13:17:16,557 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 160 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:16,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 49 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:17:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-12-14 13:17:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2022-12-14 13:17:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.6098602484472049) internal successors, (4147), 2576 states have internal predecessors, (4147), 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 13:17:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4147 transitions. [2022-12-14 13:17:16,593 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4147 transitions. Word has length 161 [2022-12-14 13:17:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:16,593 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 4147 transitions. [2022-12-14 13:17:16,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 13:17:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4147 transitions. [2022-12-14 13:17:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 13:17:16,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:16,597 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:16,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:17:16,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1951314285, now seen corresponding path program 1 times [2022-12-14 13:17:16,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:16,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247510884] [2022-12-14 13:17:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:17:16,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247510884] [2022-12-14 13:17:16,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247510884] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:16,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:16,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:17:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633731215] [2022-12-14 13:17:16,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:16,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:16,785 INFO L87 Difference]: Start difference. First operand 2577 states and 4147 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 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 13:17:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:17,402 INFO L93 Difference]: Finished difference Result 6440 states and 10304 transitions. [2022-12-14 13:17:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 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 171 [2022-12-14 13:17:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:17,409 INFO L225 Difference]: With dead ends: 6440 [2022-12-14 13:17:17,409 INFO L226 Difference]: Without dead ends: 3864 [2022-12-14 13:17:17,411 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 13:17:17,412 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:17,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 250 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:17:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-12-14 13:17:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3864. [2022-12-14 13:17:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3863 states have (on average 1.5081542842350504) internal successors, (5826), 3863 states have internal predecessors, (5826), 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 13:17:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 5826 transitions. [2022-12-14 13:17:17,461 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 5826 transitions. Word has length 171 [2022-12-14 13:17:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:17,461 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 5826 transitions. [2022-12-14 13:17:17,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 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 13:17:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 5826 transitions. [2022-12-14 13:17:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 13:17:17,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:17,466 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:17,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:17:17,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 913299774, now seen corresponding path program 1 times [2022-12-14 13:17:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:17,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087622240] [2022-12-14 13:17:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:17:17,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:17,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087622240] [2022-12-14 13:17:17,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087622240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:17,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:17,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:17,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077563296] [2022-12-14 13:17:17,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:17,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:17,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:17,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:17,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:17,568 INFO L87 Difference]: Start difference. First operand 3864 states and 5826 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 13:17:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:17,891 INFO L93 Difference]: Finished difference Result 7727 states and 11651 transitions. [2022-12-14 13:17:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 13:17:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:17,898 INFO L225 Difference]: With dead ends: 7727 [2022-12-14 13:17:17,898 INFO L226 Difference]: Without dead ends: 3864 [2022-12-14 13:17:17,901 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 13:17:17,901 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:17,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:17:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-12-14 13:17:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3864. [2022-12-14 13:17:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3863 states have (on average 1.4680300284752783) internal successors, (5671), 3863 states have internal predecessors, (5671), 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 13:17:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 5671 transitions. [2022-12-14 13:17:17,973 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 5671 transitions. Word has length 176 [2022-12-14 13:17:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 5671 transitions. [2022-12-14 13:17:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 13:17:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 5671 transitions. [2022-12-14 13:17:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 13:17:17,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:17,980 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:17,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:17:17,981 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1290345829, now seen corresponding path program 1 times [2022-12-14 13:17:17,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:17,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682701306] [2022-12-14 13:17:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:17,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:17:18,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:18,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682701306] [2022-12-14 13:17:18,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682701306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:18,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:18,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:17:18,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347458019] [2022-12-14 13:17:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:18,230 INFO L87 Difference]: Start difference. First operand 3864 states and 5671 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 13:17:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:18,743 INFO L93 Difference]: Finished difference Result 10587 states and 15494 transitions. [2022-12-14 13:17:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 182 [2022-12-14 13:17:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:18,762 INFO L225 Difference]: With dead ends: 10587 [2022-12-14 13:17:18,763 INFO L226 Difference]: Without dead ends: 6724 [2022-12-14 13:17:18,766 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 13:17:18,767 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:18,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 250 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:17:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2022-12-14 13:17:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 6724. [2022-12-14 13:17:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 1.3770638107987505) internal successors, (9258), 6723 states have internal predecessors, (9258), 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 13:17:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 9258 transitions. [2022-12-14 13:17:18,907 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 9258 transitions. Word has length 182 [2022-12-14 13:17:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:18,908 INFO L495 AbstractCegarLoop]: Abstraction has 6724 states and 9258 transitions. [2022-12-14 13:17:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 13:17:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 9258 transitions. [2022-12-14 13:17:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-14 13:17:18,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:18,922 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:18,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:17:18,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash 997643415, now seen corresponding path program 1 times [2022-12-14 13:17:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:18,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483913217] [2022-12-14 13:17:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:18,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 13:17:19,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483913217] [2022-12-14 13:17:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483913217] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:19,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:19,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431401569] [2022-12-14 13:17:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:19,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:19,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:19,215 INFO L87 Difference]: Start difference. First operand 6724 states and 9258 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 13:17:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:19,762 INFO L93 Difference]: Finished difference Result 17308 states and 23694 transitions. [2022-12-14 13:17:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 13:17:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:19,779 INFO L225 Difference]: With dead ends: 17308 [2022-12-14 13:17:19,779 INFO L226 Difference]: Without dead ends: 10585 [2022-12-14 13:17:19,784 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 13:17:19,784 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:19,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 63 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:17:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2022-12-14 13:17:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 10585. [2022-12-14 13:17:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 1.3350340136054422) internal successors, (14130), 10584 states have internal predecessors, (14130), 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 13:17:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 14130 transitions. [2022-12-14 13:17:19,929 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 14130 transitions. Word has length 205 [2022-12-14 13:17:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:19,929 INFO L495 AbstractCegarLoop]: Abstraction has 10585 states and 14130 transitions. [2022-12-14 13:17:19,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 13:17:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 14130 transitions. [2022-12-14 13:17:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-12-14 13:17:19,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:19,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:17:19,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 11085205, now seen corresponding path program 1 times [2022-12-14 13:17:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892700630] [2022-12-14 13:17:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:20,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892700630] [2022-12-14 13:17:20,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892700630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:20,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:20,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:17:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170033795] [2022-12-14 13:17:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:20,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:17:20,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:17:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:17:20,259 INFO L87 Difference]: Start difference. First operand 10585 states and 14130 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 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 13:17:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:20,816 INFO L93 Difference]: Finished difference Result 23457 states and 31131 transitions. [2022-12-14 13:17:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:17:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 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 214 [2022-12-14 13:17:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:20,834 INFO L225 Difference]: With dead ends: 23457 [2022-12-14 13:17:20,834 INFO L226 Difference]: Without dead ends: 13302 [2022-12-14 13:17:20,839 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 13:17:20,840 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 86 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:20,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 86 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:17:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13302 states. [2022-12-14 13:17:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13302 to 13302. [2022-12-14 13:17:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13302 states, 13301 states have (on average 1.309675964213217) internal successors, (17420), 13301 states have internal predecessors, (17420), 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 13:17:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13302 states to 13302 states and 17420 transitions. [2022-12-14 13:17:21,000 INFO L78 Accepts]: Start accepts. Automaton has 13302 states and 17420 transitions. Word has length 214 [2022-12-14 13:17:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:21,000 INFO L495 AbstractCegarLoop]: Abstraction has 13302 states and 17420 transitions. [2022-12-14 13:17:21,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 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 13:17:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 13302 states and 17420 transitions. [2022-12-14 13:17:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-14 13:17:21,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:21,009 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:17:21,010 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -758821550, now seen corresponding path program 1 times [2022-12-14 13:17:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:21,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38071706] [2022-12-14 13:17:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:21,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38071706] [2022-12-14 13:17:21,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38071706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:17:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607875456] [2022-12-14 13:17:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:21,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:17:21,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:17:21,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:17:21,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:17:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:21,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:17:21,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:17:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:22,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:17:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:17:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607875456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:17:22,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016321208] [2022-12-14 13:17:22,367 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 13:17:22,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:17:22,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:17:22,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:17:22,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:17:42,173 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2022-12-14 13:17:42,276 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7602 conjuctions. This might take some time... [2022-12-14 13:17:42,323 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 48 conjuctions. [2022-12-14 13:17:42,327 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2022-12-14 13:17:42,421 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7602 conjuctions. This might take some time... [2022-12-14 13:17:42,470 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 48 conjuctions. [2022-12-14 13:17:42,525 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2022-12-14 13:17:42,623 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7602 conjuctions. This might take some time... [2022-12-14 13:17:42,672 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 48 conjuctions. [2022-12-14 13:17:45,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:17:54,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1016321208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:54,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:17:54,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4, 4] total 15 [2022-12-14 13:17:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269571752] [2022-12-14 13:17:54,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:17:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:17:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:17:54,226 INFO L87 Difference]: Start difference. First operand 13302 states and 17420 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 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 13:17:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:57,082 INFO L93 Difference]: Finished difference Result 26747 states and 35033 transitions. [2022-12-14 13:17:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:17:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 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 221 [2022-12-14 13:17:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:57,096 INFO L225 Difference]: With dead ends: 26747 [2022-12-14 13:17:57,096 INFO L226 Difference]: Without dead ends: 13589 [2022-12-14 13:17:57,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 501 SyntacticMatches, 151 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:17:57,103 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 113 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:57,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 114 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 13:17:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13589 states. [2022-12-14 13:17:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13589 to 13579. [2022-12-14 13:17:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13579 states, 13578 states have (on average 1.3046840477242598) internal successors, (17715), 13578 states have internal predecessors, (17715), 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 13:17:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13579 states to 13579 states and 17715 transitions. [2022-12-14 13:17:57,233 INFO L78 Accepts]: Start accepts. Automaton has 13579 states and 17715 transitions. Word has length 221 [2022-12-14 13:17:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:57,233 INFO L495 AbstractCegarLoop]: Abstraction has 13579 states and 17715 transitions. [2022-12-14 13:17:57,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 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 13:17:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 13579 states and 17715 transitions. [2022-12-14 13:17:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-12-14 13:17:57,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:57,242 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:57,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:17:57,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:17:57,443 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash -3644461, now seen corresponding path program 1 times [2022-12-14 13:17:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:57,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665379120] [2022-12-14 13:17:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:17:57,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:57,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665379120] [2022-12-14 13:17:57,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665379120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:57,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:57,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:17:57,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094050746] [2022-12-14 13:17:57,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:57,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:17:57,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:17:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:17:57,639 INFO L87 Difference]: Start difference. First operand 13579 states and 17715 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 13:17:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:58,230 INFO L93 Difference]: Finished difference Result 28882 states and 38472 transitions. [2022-12-14 13:17:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:17:58,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 229 [2022-12-14 13:17:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:58,245 INFO L225 Difference]: With dead ends: 28882 [2022-12-14 13:17:58,245 INFO L226 Difference]: Without dead ends: 16153 [2022-12-14 13:17:58,252 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 13:17:58,253 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 294 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:58,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 10 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:17:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16153 states. [2022-12-14 13:17:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16153 to 16153. [2022-12-14 13:17:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16153 states, 16152 states have (on average 1.2906760772659733) internal successors, (20847), 16152 states have internal predecessors, (20847), 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 13:17:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16153 states to 16153 states and 20847 transitions. [2022-12-14 13:17:58,411 INFO L78 Accepts]: Start accepts. Automaton has 16153 states and 20847 transitions. Word has length 229 [2022-12-14 13:17:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:58,411 INFO L495 AbstractCegarLoop]: Abstraction has 16153 states and 20847 transitions. [2022-12-14 13:17:58,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 13:17:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 16153 states and 20847 transitions. [2022-12-14 13:17:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-14 13:17:58,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:58,420 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-12-14 13:17:58,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:17:58,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1427523739, now seen corresponding path program 1 times [2022-12-14 13:17:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856967048] [2022-12-14 13:17:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:17:58,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:58,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856967048] [2022-12-14 13:17:58,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856967048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:17:58,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:17:58,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:17:58,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463824715] [2022-12-14 13:17:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:17:58,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:17:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:17:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:17:58,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:17:58,632 INFO L87 Difference]: Start difference. First operand 16153 states and 20847 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 13:17:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:17:59,370 INFO L93 Difference]: Finished difference Result 30741 states and 39851 transitions. [2022-12-14 13:17:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:17:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 247 [2022-12-14 13:17:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:17:59,382 INFO L225 Difference]: With dead ends: 30741 [2022-12-14 13:17:59,382 INFO L226 Difference]: Without dead ends: 16153 [2022-12-14 13:17:59,390 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 13:17:59,391 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 221 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:17:59,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 47 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:17:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16153 states. [2022-12-14 13:17:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16153 to 15581. [2022-12-14 13:17:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15581 states, 15580 states have (on average 1.2960847240051347) internal successors, (20193), 15580 states have internal predecessors, (20193), 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 13:17:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15581 states to 15581 states and 20193 transitions. [2022-12-14 13:17:59,568 INFO L78 Accepts]: Start accepts. Automaton has 15581 states and 20193 transitions. Word has length 247 [2022-12-14 13:17:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:17:59,569 INFO L495 AbstractCegarLoop]: Abstraction has 15581 states and 20193 transitions. [2022-12-14 13:17:59,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 13:17:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 15581 states and 20193 transitions. [2022-12-14 13:17:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-12-14 13:17:59,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:17:59,576 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:17:59,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:17:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:17:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 768527486, now seen corresponding path program 1 times [2022-12-14 13:17:59,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:17:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679633369] [2022-12-14 13:17:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:17:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-14 13:17:59,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:17:59,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679633369] [2022-12-14 13:17:59,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679633369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:17:59,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136530428] [2022-12-14 13:17:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:17:59,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:17:59,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:17:59,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:17:59,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:17:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:17:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:17:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:18:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 13:18:00,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:18:00,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136530428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:18:00,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:18:00,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 13:18:00,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429848371] [2022-12-14 13:18:00,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:18:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:18:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:18:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:18:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:18:00,084 INFO L87 Difference]: Start difference. First operand 15581 states and 20193 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 13:18:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:18:00,698 INFO L93 Difference]: Finished difference Result 31027 states and 40896 transitions. [2022-12-14 13:18:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:18:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 254 [2022-12-14 13:18:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:18:00,713 INFO L225 Difference]: With dead ends: 31027 [2022-12-14 13:18:00,713 INFO L226 Difference]: Without dead ends: 16582 [2022-12-14 13:18:00,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 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 13:18:00,721 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:18:00,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 74 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:18:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16582 states. [2022-12-14 13:18:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16582 to 16582. [2022-12-14 13:18:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16582 states, 16581 states have (on average 1.297750437247452) internal successors, (21518), 16581 states have internal predecessors, (21518), 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 13:18:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16582 states to 16582 states and 21518 transitions. [2022-12-14 13:18:00,901 INFO L78 Accepts]: Start accepts. Automaton has 16582 states and 21518 transitions. Word has length 254 [2022-12-14 13:18:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:18:00,902 INFO L495 AbstractCegarLoop]: Abstraction has 16582 states and 21518 transitions. [2022-12-14 13:18:00,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 13:18:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 16582 states and 21518 transitions. [2022-12-14 13:18:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-12-14 13:18:00,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:18:00,909 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:00,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 13:18:01,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:18:01,111 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:18:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:18:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1203887037, now seen corresponding path program 1 times [2022-12-14 13:18:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:18:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653299232] [2022-12-14 13:18:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:18:01,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:18:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:18:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:18:01,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:18:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653299232] [2022-12-14 13:18:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653299232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:18:01,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:18:01,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:18:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64565922] [2022-12-14 13:18:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:18:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:18:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:18:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:18:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:18:01,395 INFO L87 Difference]: Start difference. First operand 16582 states and 21518 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 13:18:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:18:02,352 INFO L93 Difference]: Finished difference Result 52336 states and 68594 transitions. [2022-12-14 13:18:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:18:02,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 265 [2022-12-14 13:18:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:18:02,385 INFO L225 Difference]: With dead ends: 52336 [2022-12-14 13:18:02,385 INFO L226 Difference]: Without dead ends: 36747 [2022-12-14 13:18:02,397 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 13:18:02,397 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 357 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:18:02,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 147 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:18:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36747 states. [2022-12-14 13:18:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36747 to 36745. [2022-12-14 13:18:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36745 states, 36744 states have (on average 1.2782222947964295) internal successors, (46967), 36744 states have internal predecessors, (46967), 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 13:18:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 46967 transitions. [2022-12-14 13:18:02,809 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 46967 transitions. Word has length 265 [2022-12-14 13:18:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:18:02,810 INFO L495 AbstractCegarLoop]: Abstraction has 36745 states and 46967 transitions. [2022-12-14 13:18:02,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 13:18:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 46967 transitions. [2022-12-14 13:18:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 13:18:02,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:18:02,826 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-12-14 13:18:02,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 13:18:02,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:18:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:18:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash -854555460, now seen corresponding path program 1 times [2022-12-14 13:18:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:18:02,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733770582] [2022-12-14 13:18:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:18:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:18:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:18:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:18:03,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:18:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733770582] [2022-12-14 13:18:03,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733770582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:18:03,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:18:03,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:18:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963502411] [2022-12-14 13:18:03,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:18:03,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:18:03,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:18:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:18:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:18:03,133 INFO L87 Difference]: Start difference. First operand 36745 states and 46967 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 13:18:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:18:03,875 INFO L93 Difference]: Finished difference Result 75500 states and 97100 transitions. [2022-12-14 13:18:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:18:03,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 13:18:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:18:03,908 INFO L225 Difference]: With dead ends: 75500 [2022-12-14 13:18:03,908 INFO L226 Difference]: Without dead ends: 39891 [2022-12-14 13:18:03,921 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 13:18:03,921 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:18:03,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:18:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39891 states. [2022-12-14 13:18:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39891 to 38890. [2022-12-14 13:18:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38890 states, 38889 states have (on average 1.2885391756023554) internal successors, (50110), 38889 states have internal predecessors, (50110), 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 13:18:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38890 states to 38890 states and 50110 transitions. [2022-12-14 13:18:04,303 INFO L78 Accepts]: Start accepts. Automaton has 38890 states and 50110 transitions. Word has length 271 [2022-12-14 13:18:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:18:04,304 INFO L495 AbstractCegarLoop]: Abstraction has 38890 states and 50110 transitions. [2022-12-14 13:18:04,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 13:18:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 38890 states and 50110 transitions. [2022-12-14 13:18:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-12-14 13:18:04,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:18:04,354 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 13:18:04,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 13:18:04,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:18:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:18:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash 973585277, now seen corresponding path program 2 times [2022-12-14 13:18:04,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:18:04,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386637924] [2022-12-14 13:18:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:18:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:18:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:18:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:18:04,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:18:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386637924] [2022-12-14 13:18:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386637924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:18:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808090947] [2022-12-14 13:18:04,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:18:04,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:18:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:18:04,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:18:04,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:18:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:18:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:18:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:18:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:18:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:18:05,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:18:05,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808090947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:18:05,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:18:05,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 13:18:05,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869384943] [2022-12-14 13:18:05,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:18:05,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:18:05,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:18:05,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:18:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:18:05,135 INFO L87 Difference]: Start difference. First operand 38890 states and 50110 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 13:18:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:18:05,837 INFO L93 Difference]: Finished difference Result 87083 states and 112710 transitions. [2022-12-14 13:18:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:18:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 278 [2022-12-14 13:18:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:18:05,883 INFO L225 Difference]: With dead ends: 87083 [2022-12-14 13:18:05,884 INFO L226 Difference]: Without dead ends: 49329 [2022-12-14 13:18:05,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:18:05,900 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:18:05,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 91 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:18:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49329 states. [2022-12-14 13:18:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49329 to 37603. [2022-12-14 13:18:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37603 states, 37602 states have (on average 1.2673262060528696) internal successors, (47654), 37602 states have internal predecessors, (47654), 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 13:18:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37603 states to 37603 states and 47654 transitions. [2022-12-14 13:18:06,325 INFO L78 Accepts]: Start accepts. Automaton has 37603 states and 47654 transitions. Word has length 278 [2022-12-14 13:18:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:18:06,325 INFO L495 AbstractCegarLoop]: Abstraction has 37603 states and 47654 transitions. [2022-12-14 13:18:06,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 13:18:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 37603 states and 47654 transitions. [2022-12-14 13:18:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-12-14 13:18:06,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:18:06,341 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 13:18:06,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:18:06,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:18:06,543 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:18:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:18:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1356962831, now seen corresponding path program 1 times [2022-12-14 13:18:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:18:06,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536431939] [2022-12-14 13:18:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:18:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:18:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:18:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-12-14 13:18:07,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:18:07,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536431939] [2022-12-14 13:18:07,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536431939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:18:07,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462463409] [2022-12-14 13:18:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:18:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:18:07,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:18:07,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:18:07,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e919797-b6de-4579-8b8a-b141a0e9dda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:18:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:18:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:18:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:18:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:18:08,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:18:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:18:08,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462463409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:18:08,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710299930] [2022-12-14 13:18:08,586 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 13:18:08,586 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:18:08,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:18:08,587 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:18:08,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs