./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be1fcaa299b4a26d5c3c0d4f857b13329cbb7ec0505911e54bd9d27d2647b4d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:34,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:34,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:34,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:34,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:34,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:34,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:34,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:34,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:34,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:34,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:34,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:34,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:34,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:34,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:34,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:34,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:34,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:34,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:34,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:34,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:34,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:34,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:34,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:34,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:34,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:34,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:34,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:34,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:34,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:34,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:34,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:34,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:34,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:34,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:34,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:34,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:34,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:34,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:34,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:34,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:34,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:35:34,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:34,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:34,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:34,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:34,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:34,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:34,525 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:34,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:34,525 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:34,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:35:34,527 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:34,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:34,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:35:34,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:35:34,528 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:34,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:35:34,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:35:34,528 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:35:34,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:34,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:35:34,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:35:34,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:35:34,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:34,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:34,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:34,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:34,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:35:34,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:34,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:34,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:34,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:34,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:34,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:34,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:34,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:35:34,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:34,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:34,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:35:34,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:35:34,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:34,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:34,534 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_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1fcaa299b4a26d5c3c0d4f857b13329cbb7ec0505911e54bd9d27d2647b4d4 [2022-11-03 02:35:34,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:34,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:34,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:34,903 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:34,903 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:34,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2022-11-03 02:35:34,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/data/9c28df13d/7d7a230cb69a4a8f93136054c2f63246/FLAG7d14c82f4 [2022-11-03 02:35:35,749 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:35,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2022-11-03 02:35:35,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/data/9c28df13d/7d7a230cb69a4a8f93136054c2f63246/FLAG7d14c82f4 [2022-11-03 02:35:35,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/data/9c28df13d/7d7a230cb69a4a8f93136054c2f63246 [2022-11-03 02:35:35,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:35,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:35,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:35,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:35,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:35,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:35" (1/1) ... [2022-11-03 02:35:35,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f08dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:35, skipping insertion in model container [2022-11-03 02:35:35,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:35" (1/1) ... [2022-11-03 02:35:35,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:36,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:36,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2022-11-03 02:35:36,319 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2022-11-03 02:35:36,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2022-11-03 02:35:36,439 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2022-11-03 02:35:36,559 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2022-11-03 02:35:36,625 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2022-11-03 02:35:36,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:36,878 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:36,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[7172,7185] [2022-11-03 02:35:36,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[10914,10927] [2022-11-03 02:35:37,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[17944,17957] [2022-11-03 02:35:37,045 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[24017,24030] [2022-11-03 02:35:37,090 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42645,42658] [2022-11-03 02:35:37,163 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[64626,64639] [2022-11-03 02:35:37,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:37,335 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:37,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37 WrapperNode [2022-11-03 02:35:37,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:37,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:37,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:37,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:37,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,491 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5288 [2022-11-03 02:35:37,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:37,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:37,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:37,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:37,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,649 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:37,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:37,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:37,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:37,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:37,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:37,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:37,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:37,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:35:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:35:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:38,088 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:38,091 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:41,091 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:41,564 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:41,564 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:35:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:41 BoogieIcfgContainer [2022-11-03 02:35:41,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:41,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:41,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:41,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:41,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:35" (1/3) ... [2022-11-03 02:35:41,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef2bc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:41, skipping insertion in model container [2022-11-03 02:35:41,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (2/3) ... [2022-11-03 02:35:41,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef2bc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:41, skipping insertion in model container [2022-11-03 02:35:41,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:41" (3/3) ... [2022-11-03 02:35:41,584 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2022-11-03 02:35:41,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:41,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-03 02:35:41,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:41,710 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;@534fedba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:41,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-03 02:35:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 1053 states, 1046 states have (on average 1.8355640535372848) internal successors, (1920), 1052 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:35:41,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:41,747 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] [2022-11-03 02:35:41,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:41,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2020000843, now seen corresponding path program 1 times [2022-11-03 02:35:41,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:41,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396680196] [2022-11-03 02:35:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:41,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:42,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:42,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396680196] [2022-11-03 02:35:42,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396680196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:42,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:42,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279910221] [2022-11-03 02:35:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:42,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:42,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:42,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:42,372 INFO L87 Difference]: Start difference. First operand has 1053 states, 1046 states have (on average 1.8355640535372848) internal successors, (1920), 1052 states have internal predecessors, (1920), 0 states have call successors, (0), 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 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:43,939 INFO L93 Difference]: Finished difference Result 1879 states and 3332 transitions. [2022-11-03 02:35:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:35:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:43,960 INFO L225 Difference]: With dead ends: 1879 [2022-11-03 02:35:43,960 INFO L226 Difference]: Without dead ends: 1220 [2022-11-03 02:35:43,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:43,969 INFO L413 NwaCegarLoop]: 965 mSDtfsCounter, 5896 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5896 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:43,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5896 Valid, 1246 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:35:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-03 02:35:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1208. [2022-11-03 02:35:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1202 states have (on average 1.2961730449251248) internal successors, (1558), 1207 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1558 transitions. [2022-11-03 02:35:44,121 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1558 transitions. Word has length 50 [2022-11-03 02:35:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:44,121 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1558 transitions. [2022-11-03 02:35:44,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1558 transitions. [2022-11-03 02:35:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:35:44,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:44,127 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] [2022-11-03 02:35:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:44,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash -371948326, now seen corresponding path program 1 times [2022-11-03 02:35:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:44,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940047082] [2022-11-03 02:35:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:44,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:44,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940047082] [2022-11-03 02:35:44,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940047082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:44,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:44,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:44,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023329719] [2022-11-03 02:35:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:44,324 INFO L87 Difference]: Start difference. First operand 1208 states and 1558 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:45,374 INFO L93 Difference]: Finished difference Result 2197 states and 2879 transitions. [2022-11-03 02:35:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:35:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:45,387 INFO L225 Difference]: With dead ends: 2197 [2022-11-03 02:35:45,387 INFO L226 Difference]: Without dead ends: 1474 [2022-11-03 02:35:45,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:45,392 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 3680 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:45,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3680 Valid, 675 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:35:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-11-03 02:35:45,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1464. [2022-11-03 02:35:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1458 states have (on average 1.3072702331961592) internal successors, (1906), 1463 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1906 transitions. [2022-11-03 02:35:45,514 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1906 transitions. Word has length 50 [2022-11-03 02:35:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:45,514 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 1906 transitions. [2022-11-03 02:35:45,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1906 transitions. [2022-11-03 02:35:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:35:45,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:45,518 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] [2022-11-03 02:35:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:35:45,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1656171021, now seen corresponding path program 1 times [2022-11-03 02:35:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:45,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94984206] [2022-11-03 02:35:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:45,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:45,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94984206] [2022-11-03 02:35:45,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94984206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:45,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:45,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750708738] [2022-11-03 02:35:45,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:45,667 INFO L87 Difference]: Start difference. First operand 1464 states and 1906 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:46,740 INFO L93 Difference]: Finished difference Result 2827 states and 3713 transitions. [2022-11-03 02:35:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:46,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:35:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:46,749 INFO L225 Difference]: With dead ends: 2827 [2022-11-03 02:35:46,749 INFO L226 Difference]: Without dead ends: 2099 [2022-11-03 02:35:46,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:46,755 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 3308 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3308 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:46,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3308 Valid, 646 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:35:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-11-03 02:35:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2093. [2022-11-03 02:35:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2980354575946333) internal successors, (2709), 2092 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2709 transitions. [2022-11-03 02:35:46,970 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2709 transitions. Word has length 50 [2022-11-03 02:35:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:46,970 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2709 transitions. [2022-11-03 02:35:46,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2709 transitions. [2022-11-03 02:35:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:35:46,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:46,975 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] [2022-11-03 02:35:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:35:46,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1156025879, now seen corresponding path program 1 times [2022-11-03 02:35:46,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:46,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571254084] [2022-11-03 02:35:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:46,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:47,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:47,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571254084] [2022-11-03 02:35:47,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571254084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:47,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:47,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:35:47,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301784471] [2022-11-03 02:35:47,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:47,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:35:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:35:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:47,396 INFO L87 Difference]: Start difference. First operand 2093 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:49,963 INFO L93 Difference]: Finished difference Result 3391 states and 4452 transitions. [2022-11-03 02:35:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:35:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:35:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:49,981 INFO L225 Difference]: With dead ends: 3391 [2022-11-03 02:35:49,981 INFO L226 Difference]: Without dead ends: 3386 [2022-11-03 02:35:49,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:35:49,991 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 1959 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:49,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 2457 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:35:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-11-03 02:35:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2093. [2022-11-03 02:35:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2975563009103976) internal successors, (2708), 2092 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2708 transitions. [2022-11-03 02:35:50,223 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2708 transitions. Word has length 51 [2022-11-03 02:35:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:50,224 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2708 transitions. [2022-11-03 02:35:50,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2708 transitions. [2022-11-03 02:35:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:35:50,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:50,227 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] [2022-11-03 02:35:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:35:50,228 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash 544097692, now seen corresponding path program 1 times [2022-11-03 02:35:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966720642] [2022-11-03 02:35:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:50,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:50,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966720642] [2022-11-03 02:35:50,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966720642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:50,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:50,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:35:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906169852] [2022-11-03 02:35:50,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:50,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:35:50,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:50,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:35:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:50,624 INFO L87 Difference]: Start difference. First operand 2093 states and 2708 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:53,295 INFO L93 Difference]: Finished difference Result 3833 states and 5088 transitions. [2022-11-03 02:35:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:35:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:35:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:53,308 INFO L225 Difference]: With dead ends: 3833 [2022-11-03 02:35:53,308 INFO L226 Difference]: Without dead ends: 3510 [2022-11-03 02:35:53,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:35:53,310 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 2785 mSDsluCounter, 2183 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2785 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:53,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2785 Valid, 2737 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:35:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-11-03 02:35:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2093. [2022-11-03 02:35:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.297077144226162) internal successors, (2707), 2092 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2707 transitions. [2022-11-03 02:35:53,532 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2707 transitions. Word has length 51 [2022-11-03 02:35:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:53,533 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2707 transitions. [2022-11-03 02:35:53,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2707 transitions. [2022-11-03 02:35:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:35:53,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:53,537 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] [2022-11-03 02:35:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:35:53,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1134807775, now seen corresponding path program 1 times [2022-11-03 02:35:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:53,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177157008] [2022-11-03 02:35:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:53,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:53,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177157008] [2022-11-03 02:35:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177157008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:53,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:53,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:35:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127790071] [2022-11-03 02:35:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:53,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:35:53,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:35:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:53,872 INFO L87 Difference]: Start difference. First operand 2093 states and 2707 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:55,640 INFO L93 Difference]: Finished difference Result 3455 states and 4567 transitions. [2022-11-03 02:35:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:35:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:35:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:55,651 INFO L225 Difference]: With dead ends: 3455 [2022-11-03 02:35:55,651 INFO L226 Difference]: Without dead ends: 3008 [2022-11-03 02:35:55,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:35:55,653 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 3443 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:55,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 1426 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:35:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-11-03 02:35:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2093. [2022-11-03 02:35:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2087 states have (on average 1.2965979875419262) internal successors, (2706), 2092 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2706 transitions. [2022-11-03 02:35:55,851 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2706 transitions. Word has length 51 [2022-11-03 02:35:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:55,851 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2706 transitions. [2022-11-03 02:35:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2706 transitions. [2022-11-03 02:35:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:35:55,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:55,854 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] [2022-11-03 02:35:55,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:35:55,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1876349593, now seen corresponding path program 1 times [2022-11-03 02:35:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:55,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948008193] [2022-11-03 02:35:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:55,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:55,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948008193] [2022-11-03 02:35:55,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948008193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:55,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:55,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:55,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401911394] [2022-11-03 02:35:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:55,918 INFO L87 Difference]: Start difference. First operand 2093 states and 2706 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:56,297 INFO L93 Difference]: Finished difference Result 2855 states and 3765 transitions. [2022-11-03 02:35:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-03 02:35:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:56,303 INFO L225 Difference]: With dead ends: 2855 [2022-11-03 02:35:56,304 INFO L226 Difference]: Without dead ends: 1802 [2022-11-03 02:35:56,305 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 [2022-11-03 02:35:56,306 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 522 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:56,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1122 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-11-03 02:35:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2022-11-03 02:35:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1794 states have (on average 1.2709030100334449) internal successors, (2280), 1799 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2280 transitions. [2022-11-03 02:35:56,564 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2280 transitions. Word has length 52 [2022-11-03 02:35:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:56,564 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 2280 transitions. [2022-11-03 02:35:56,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:56,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2280 transitions. [2022-11-03 02:35:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:35:56,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:56,567 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] [2022-11-03 02:35:56,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:35:56,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash -128279793, now seen corresponding path program 1 times [2022-11-03 02:35:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:56,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8147527] [2022-11-03 02:35:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:56,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:56,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8147527] [2022-11-03 02:35:56,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8147527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:56,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:56,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:56,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914689555] [2022-11-03 02:35:56,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:56,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:56,660 INFO L87 Difference]: Start difference. First operand 1800 states and 2280 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:57,092 INFO L93 Difference]: Finished difference Result 2757 states and 3658 transitions. [2022-11-03 02:35:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-03 02:35:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:57,103 INFO L225 Difference]: With dead ends: 2757 [2022-11-03 02:35:57,104 INFO L226 Difference]: Without dead ends: 2057 [2022-11-03 02:35:57,109 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 [2022-11-03 02:35:57,115 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 377 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:57,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1207 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-11-03 02:35:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2055. [2022-11-03 02:35:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2049 states have (on average 1.3025866276232307) internal successors, (2669), 2054 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2669 transitions. [2022-11-03 02:35:57,454 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2669 transitions. Word has length 52 [2022-11-03 02:35:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:57,454 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 2669 transitions. [2022-11-03 02:35:57,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2669 transitions. [2022-11-03 02:35:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:35:57,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:57,457 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] [2022-11-03 02:35:57,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:35:57,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -678266137, now seen corresponding path program 1 times [2022-11-03 02:35:57,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:57,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399590404] [2022-11-03 02:35:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:57,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:57,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399590404] [2022-11-03 02:35:57,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399590404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:57,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:57,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184941255] [2022-11-03 02:35:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:57,520 INFO L87 Difference]: Start difference. First operand 2055 states and 2669 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:58,173 INFO L93 Difference]: Finished difference Result 3729 states and 5048 transitions. [2022-11-03 02:35:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-03 02:35:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:58,182 INFO L225 Difference]: With dead ends: 3729 [2022-11-03 02:35:58,183 INFO L226 Difference]: Without dead ends: 2601 [2022-11-03 02:35:58,185 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 [2022-11-03 02:35:58,186 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 349 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:58,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1228 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2022-11-03 02:35:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2599. [2022-11-03 02:35:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2593 states have (on average 1.321635171615889) internal successors, (3427), 2598 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3427 transitions. [2022-11-03 02:35:58,746 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3427 transitions. Word has length 52 [2022-11-03 02:35:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:58,746 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3427 transitions. [2022-11-03 02:35:58,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3427 transitions. [2022-11-03 02:35:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:35:58,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:58,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:58,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:35:58,750 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:58,750 INFO L85 PathProgramCache]: Analyzing trace with hash 396589116, now seen corresponding path program 1 times [2022-11-03 02:35:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:58,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783428840] [2022-11-03 02:35:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:58,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:58,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:58,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783428840] [2022-11-03 02:35:58,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783428840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:58,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:58,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:58,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280308395] [2022-11-03 02:35:58,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:58,800 INFO L87 Difference]: Start difference. First operand 2599 states and 3427 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:59,396 INFO L93 Difference]: Finished difference Result 4611 states and 6191 transitions. [2022-11-03 02:35:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-11-03 02:35:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:59,405 INFO L225 Difference]: With dead ends: 4611 [2022-11-03 02:35:59,405 INFO L226 Difference]: Without dead ends: 2525 [2022-11-03 02:35:59,409 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 [2022-11-03 02:35:59,409 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 557 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:59,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 801 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2022-11-03 02:35:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2213. [2022-11-03 02:35:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2208 states have (on average 1.3269927536231885) internal successors, (2930), 2212 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2930 transitions. [2022-11-03 02:35:59,775 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2930 transitions. Word has length 53 [2022-11-03 02:35:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:59,776 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 2930 transitions. [2022-11-03 02:35:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2930 transitions. [2022-11-03 02:35:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:35:59,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:59,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:35:59,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:35:59,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1097574629, now seen corresponding path program 1 times [2022-11-03 02:35:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:59,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225642668] [2022-11-03 02:35:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:59,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225642668] [2022-11-03 02:35:59,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225642668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:59,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:59,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130241478] [2022-11-03 02:35:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:59,829 INFO L87 Difference]: Start difference. First operand 2213 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:00,331 INFO L93 Difference]: Finished difference Result 4102 states and 5512 transitions. [2022-11-03 02:36:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:36:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-11-03 02:36:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:00,341 INFO L225 Difference]: With dead ends: 4102 [2022-11-03 02:36:00,341 INFO L226 Difference]: Without dead ends: 2233 [2022-11-03 02:36:00,345 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 [2022-11-03 02:36:00,345 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 445 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:00,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 595 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-11-03 02:36:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1971. [2022-11-03 02:36:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1967 states have (on average 1.335027961362481) internal successors, (2626), 1970 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2626 transitions. [2022-11-03 02:36:00,714 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2626 transitions. Word has length 53 [2022-11-03 02:36:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:00,715 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 2626 transitions. [2022-11-03 02:36:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2626 transitions. [2022-11-03 02:36:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:36:00,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:00,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:00,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:36:00,717 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1858325642, now seen corresponding path program 1 times [2022-11-03 02:36:00,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946818635] [2022-11-03 02:36:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:00,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:01,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:01,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946818635] [2022-11-03 02:36:01,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946818635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:01,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:01,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:36:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878128] [2022-11-03 02:36:01,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:01,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:36:01,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:36:01,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:36:01,434 INFO L87 Difference]: Start difference. First operand 1971 states and 2626 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:03,888 INFO L93 Difference]: Finished difference Result 3713 states and 4935 transitions. [2022-11-03 02:36:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:36:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-11-03 02:36:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:03,899 INFO L225 Difference]: With dead ends: 3713 [2022-11-03 02:36:03,899 INFO L226 Difference]: Without dead ends: 3491 [2022-11-03 02:36:03,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:36:03,902 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 2365 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2365 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:03,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2365 Valid, 4412 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:36:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-03 02:36:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 1959. [2022-11-03 02:36:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1956 states have (on average 1.3353783231083844) internal successors, (2612), 1958 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2612 transitions. [2022-11-03 02:36:04,326 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2612 transitions. Word has length 54 [2022-11-03 02:36:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:04,326 INFO L495 AbstractCegarLoop]: Abstraction has 1959 states and 2612 transitions. [2022-11-03 02:36:04,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2612 transitions. [2022-11-03 02:36:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:36:04,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:04,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:04,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:36:04,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:04,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:04,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1760291884, now seen corresponding path program 1 times [2022-11-03 02:36:04,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:04,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144068156] [2022-11-03 02:36:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:04,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:04,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144068156] [2022-11-03 02:36:04,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144068156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:04,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:04,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:36:04,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230477498] [2022-11-03 02:36:04,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:04,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:36:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:36:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:36:04,855 INFO L87 Difference]: Start difference. First operand 1959 states and 2612 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:07,532 INFO L93 Difference]: Finished difference Result 4069 states and 5389 transitions. [2022-11-03 02:36:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:36:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-11-03 02:36:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:07,542 INFO L225 Difference]: With dead ends: 4069 [2022-11-03 02:36:07,543 INFO L226 Difference]: Without dead ends: 3831 [2022-11-03 02:36:07,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:36:07,545 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 3221 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3221 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:07,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3221 Valid, 2654 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:36:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2022-11-03 02:36:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 1931. [2022-11-03 02:36:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1929 states have (on average 1.3364437532400206) internal successors, (2578), 1930 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2578 transitions. [2022-11-03 02:36:08,199 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2578 transitions. Word has length 54 [2022-11-03 02:36:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:08,199 INFO L495 AbstractCegarLoop]: Abstraction has 1931 states and 2578 transitions. [2022-11-03 02:36:08,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2578 transitions. [2022-11-03 02:36:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:36:08,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:08,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:08,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:36:08,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash 915713314, now seen corresponding path program 1 times [2022-11-03 02:36:08,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:08,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390145273] [2022-11-03 02:36:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:08,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:08,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390145273] [2022-11-03 02:36:08,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390145273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:08,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:08,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:36:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479000714] [2022-11-03 02:36:08,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:08,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:36:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:36:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:36:08,764 INFO L87 Difference]: Start difference. First operand 1931 states and 2578 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:11,999 INFO L93 Difference]: Finished difference Result 4292 states and 5685 transitions. [2022-11-03 02:36:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:36:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-11-03 02:36:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:12,005 INFO L225 Difference]: With dead ends: 4292 [2022-11-03 02:36:12,005 INFO L226 Difference]: Without dead ends: 4061 [2022-11-03 02:36:12,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:36:12,007 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 2228 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2228 SdHoareTripleChecker+Valid, 3867 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:12,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2228 Valid, 3867 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:36:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2022-11-03 02:36:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 1910. [2022-11-03 02:36:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 1.3368255631220534) internal successors, (2552), 1909 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2552 transitions. [2022-11-03 02:36:12,618 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2552 transitions. Word has length 54 [2022-11-03 02:36:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2552 transitions. [2022-11-03 02:36:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2552 transitions. [2022-11-03 02:36:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:36:12,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:12,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:36:12,621 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 711019173, now seen corresponding path program 1 times [2022-11-03 02:36:12,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098206378] [2022-11-03 02:36:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:12,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:12,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098206378] [2022-11-03 02:36:12,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098206378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:12,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:12,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:36:12,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309913265] [2022-11-03 02:36:12,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:12,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:36:12,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:12,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:36:12,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:36:12,728 INFO L87 Difference]: Start difference. First operand 1910 states and 2552 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:13,897 INFO L93 Difference]: Finished difference Result 4345 states and 5958 transitions. [2022-11-03 02:36:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:36:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-11-03 02:36:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:13,903 INFO L225 Difference]: With dead ends: 4345 [2022-11-03 02:36:13,903 INFO L226 Difference]: Without dead ends: 2871 [2022-11-03 02:36:13,906 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 [2022-11-03 02:36:13,906 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 189 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 645 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2022-11-03 02:36:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2563. [2022-11-03 02:36:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 1.336455893832943) internal successors, (3424), 2562 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3424 transitions. [2022-11-03 02:36:14,893 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3424 transitions. Word has length 55 [2022-11-03 02:36:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:14,893 INFO L495 AbstractCegarLoop]: Abstraction has 2563 states and 3424 transitions. [2022-11-03 02:36:14,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3424 transitions. [2022-11-03 02:36:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:36:14,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:14,897 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] [2022-11-03 02:36:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:36:14,898 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash 56664476, now seen corresponding path program 1 times [2022-11-03 02:36:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664589831] [2022-11-03 02:36:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:15,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664589831] [2022-11-03 02:36:15,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664589831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:15,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:15,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:36:15,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724244935] [2022-11-03 02:36:15,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:15,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:15,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:15,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:15,058 INFO L87 Difference]: Start difference. First operand 2563 states and 3424 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:16,349 INFO L93 Difference]: Finished difference Result 4381 states and 5925 transitions. [2022-11-03 02:36:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-11-03 02:36:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:16,354 INFO L225 Difference]: With dead ends: 4381 [2022-11-03 02:36:16,354 INFO L226 Difference]: Without dead ends: 2315 [2022-11-03 02:36:16,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:16,357 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 431 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:16,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 657 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-11-03 02:36:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2311. [2022-11-03 02:36:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 1.325974025974026) internal successors, (3063), 2310 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3063 transitions. [2022-11-03 02:36:17,089 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3063 transitions. Word has length 57 [2022-11-03 02:36:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:17,089 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 3063 transitions. [2022-11-03 02:36:17,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3063 transitions. [2022-11-03 02:36:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:36:17,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:17,090 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] [2022-11-03 02:36:17,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:36:17,090 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1969903368, now seen corresponding path program 1 times [2022-11-03 02:36:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:17,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729958603] [2022-11-03 02:36:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:17,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:17,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729958603] [2022-11-03 02:36:17,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729958603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:17,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:17,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:36:17,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818392641] [2022-11-03 02:36:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:17,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:36:17,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:36:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:36:17,232 INFO L87 Difference]: Start difference. First operand 2311 states and 3063 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:18,523 INFO L93 Difference]: Finished difference Result 4987 states and 6763 transitions. [2022-11-03 02:36:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:36:18,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-11-03 02:36:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:18,530 INFO L225 Difference]: With dead ends: 4987 [2022-11-03 02:36:18,530 INFO L226 Difference]: Without dead ends: 3275 [2022-11-03 02:36:18,532 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 [2022-11-03 02:36:18,533 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 207 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:18,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 582 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-11-03 02:36:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2979. [2022-11-03 02:36:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2978 states have (on average 1.3237071860308933) internal successors, (3942), 2978 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3942 transitions. [2022-11-03 02:36:19,739 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3942 transitions. Word has length 59 [2022-11-03 02:36:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:19,740 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 3942 transitions. [2022-11-03 02:36:19,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3942 transitions. [2022-11-03 02:36:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:36:19,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:19,741 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] [2022-11-03 02:36:19,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:36:19,742 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:19,742 INFO L85 PathProgramCache]: Analyzing trace with hash -583869939, now seen corresponding path program 1 times [2022-11-03 02:36:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567014618] [2022-11-03 02:36:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:19,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:20,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:20,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567014618] [2022-11-03 02:36:20,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567014618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:20,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:20,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:36:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434173277] [2022-11-03 02:36:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:36:20,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:36:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:20,063 INFO L87 Difference]: Start difference. First operand 2979 states and 3942 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:22,998 INFO L93 Difference]: Finished difference Result 6236 states and 8218 transitions. [2022-11-03 02:36:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:36:22,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 02:36:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:23,014 INFO L225 Difference]: With dead ends: 6236 [2022-11-03 02:36:23,014 INFO L226 Difference]: Without dead ends: 6234 [2022-11-03 02:36:23,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:36:23,017 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 1629 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:23,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 2060 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2022-11-03 02:36:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 3480. [2022-11-03 02:36:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3480 states, 3479 states have (on average 1.3179074446680081) internal successors, (4585), 3479 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 4585 transitions. [2022-11-03 02:36:24,681 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 4585 transitions. Word has length 60 [2022-11-03 02:36:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:24,681 INFO L495 AbstractCegarLoop]: Abstraction has 3480 states and 4585 transitions. [2022-11-03 02:36:24,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 4585 transitions. [2022-11-03 02:36:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:36:24,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:24,682 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] [2022-11-03 02:36:24,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:36:24,683 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1377387279, now seen corresponding path program 1 times [2022-11-03 02:36:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276712435] [2022-11-03 02:36:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:25,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276712435] [2022-11-03 02:36:25,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276712435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:25,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:25,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:36:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917941354] [2022-11-03 02:36:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:25,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:36:25,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:36:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:25,037 INFO L87 Difference]: Start difference. First operand 3480 states and 4585 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:28,262 INFO L93 Difference]: Finished difference Result 6094 states and 8033 transitions. [2022-11-03 02:36:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:36:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-03 02:36:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:28,274 INFO L225 Difference]: With dead ends: 6094 [2022-11-03 02:36:28,275 INFO L226 Difference]: Without dead ends: 6092 [2022-11-03 02:36:28,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:36:28,277 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1225 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:28,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 2152 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2022-11-03 02:36:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 3751. [2022-11-03 02:36:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 1.3141333333333334) internal successors, (4928), 3750 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 4928 transitions. [2022-11-03 02:36:29,834 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 4928 transitions. Word has length 66 [2022-11-03 02:36:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:29,835 INFO L495 AbstractCegarLoop]: Abstraction has 3751 states and 4928 transitions. [2022-11-03 02:36:29,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 4928 transitions. [2022-11-03 02:36:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:36:29,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:29,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:29,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:36:29,838 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2087330740, now seen corresponding path program 1 times [2022-11-03 02:36:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914125790] [2022-11-03 02:36:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:31,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:31,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914125790] [2022-11-03 02:36:31,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914125790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165732239] [2022-11-03 02:36:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:31,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:31,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:31,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:31,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:36:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:36:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:36:31,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:31,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165732239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:31,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:31,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 22 [2022-11-03 02:36:31,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837489605] [2022-11-03 02:36:31,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:31,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:36:31,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:36:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:36:31,862 INFO L87 Difference]: Start difference. First operand 3751 states and 4928 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:35,646 INFO L93 Difference]: Finished difference Result 7039 states and 9279 transitions. [2022-11-03 02:36:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:36:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 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 68 [2022-11-03 02:36:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:35,654 INFO L225 Difference]: With dead ends: 7039 [2022-11-03 02:36:35,654 INFO L226 Difference]: Without dead ends: 5517 [2022-11-03 02:36:35,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:36:35,659 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 920 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:35,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 885 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:36:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5517 states. [2022-11-03 02:36:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5517 to 3737. [2022-11-03 02:36:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 1.3150428265524625) internal successors, (4913), 3736 states have internal predecessors, (4913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 4913 transitions. [2022-11-03 02:36:37,264 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 4913 transitions. Word has length 68 [2022-11-03 02:36:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:37,265 INFO L495 AbstractCegarLoop]: Abstraction has 3737 states and 4913 transitions. [2022-11-03 02:36:37,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 4913 transitions. [2022-11-03 02:36:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:36:37,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:37,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:37,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:36:37,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:37,493 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1366895842, now seen corresponding path program 1 times [2022-11-03 02:36:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:37,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825285213] [2022-11-03 02:36:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:38,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:38,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825285213] [2022-11-03 02:36:38,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825285213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:38,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939031618] [2022-11-03 02:36:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:38,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:38,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:38,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:38,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:36:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:38,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:36:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:36:39,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939031618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:39,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:39,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2022-11-03 02:36:39,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184021241] [2022-11-03 02:36:39,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:39,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:36:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:36:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:36:39,211 INFO L87 Difference]: Start difference. First operand 3737 states and 4913 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:42,932 INFO L93 Difference]: Finished difference Result 6739 states and 8918 transitions. [2022-11-03 02:36:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:36:42,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 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 68 [2022-11-03 02:36:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:42,937 INFO L225 Difference]: With dead ends: 6739 [2022-11-03 02:36:42,937 INFO L226 Difference]: Without dead ends: 5214 [2022-11-03 02:36:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:36:42,940 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1245 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 756 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:36:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2022-11-03 02:36:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 3545. [2022-11-03 02:36:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3544 states have (on average 1.3123589164785554) internal successors, (4651), 3544 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4651 transitions. [2022-11-03 02:36:44,566 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4651 transitions. Word has length 68 [2022-11-03 02:36:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:44,567 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 4651 transitions. [2022-11-03 02:36:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4651 transitions. [2022-11-03 02:36:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:36:44,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:44,569 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] [2022-11-03 02:36:44,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:44,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 02:36:44,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1723361321, now seen corresponding path program 1 times [2022-11-03 02:36:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:44,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723679219] [2022-11-03 02:36:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:44,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:45,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723679219] [2022-11-03 02:36:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723679219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:45,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:45,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:36:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832205069] [2022-11-03 02:36:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:36:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:36:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:45,102 INFO L87 Difference]: Start difference. First operand 3545 states and 4651 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:48,057 INFO L93 Difference]: Finished difference Result 5632 states and 7442 transitions. [2022-11-03 02:36:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:36:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-03 02:36:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:48,066 INFO L225 Difference]: With dead ends: 5632 [2022-11-03 02:36:48,066 INFO L226 Difference]: Without dead ends: 5630 [2022-11-03 02:36:48,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:36:48,068 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1297 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:48,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 2123 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2022-11-03 02:36:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 3513. [2022-11-03 02:36:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 1.3129271070615034) internal successors, (4611), 3512 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 4611 transitions. [2022-11-03 02:36:49,607 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 4611 transitions. Word has length 69 [2022-11-03 02:36:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:49,608 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 4611 transitions. [2022-11-03 02:36:49,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 4611 transitions. [2022-11-03 02:36:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:36:49,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:49,609 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] [2022-11-03 02:36:49,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:36:49,609 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1684248653, now seen corresponding path program 1 times [2022-11-03 02:36:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:49,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435357098] [2022-11-03 02:36:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:49,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:49,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435357098] [2022-11-03 02:36:49,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435357098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:49,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:49,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:36:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060876596] [2022-11-03 02:36:49,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:36:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:36:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:49,948 INFO L87 Difference]: Start difference. First operand 3513 states and 4611 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:53,263 INFO L93 Difference]: Finished difference Result 6022 states and 7925 transitions. [2022-11-03 02:36:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:36:53,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-03 02:36:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:53,269 INFO L225 Difference]: With dead ends: 6022 [2022-11-03 02:36:53,270 INFO L226 Difference]: Without dead ends: 6020 [2022-11-03 02:36:53,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:36:53,274 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 1210 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:53,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 2276 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2022-11-03 02:36:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 3803. [2022-11-03 02:36:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 1.3103629668595476) internal successors, (4982), 3802 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 4982 transitions. [2022-11-03 02:36:55,036 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 4982 transitions. Word has length 69 [2022-11-03 02:36:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:55,036 INFO L495 AbstractCegarLoop]: Abstraction has 3803 states and 4982 transitions. [2022-11-03 02:36:55,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 4982 transitions. [2022-11-03 02:36:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:36:55,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:55,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 02:36:55,038 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:36:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1065306284, now seen corresponding path program 1 times [2022-11-03 02:36:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:55,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821696538] [2022-11-03 02:36:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:55,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821696538] [2022-11-03 02:36:55,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821696538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100711037] [2022-11-03 02:36:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:55,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:55,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:36:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:36:56,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:58,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:58,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100711037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:58,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:58,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2022-11-03 02:36:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755308250] [2022-11-03 02:36:58,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:58,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:36:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:36:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:36:58,465 INFO L87 Difference]: Start difference. First operand 3803 states and 4982 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:03,181 INFO L93 Difference]: Finished difference Result 7366 states and 9683 transitions. [2022-11-03 02:37:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:37:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-03 02:37:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:03,188 INFO L225 Difference]: With dead ends: 7366 [2022-11-03 02:37:03,188 INFO L226 Difference]: Without dead ends: 5858 [2022-11-03 02:37:03,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:37:03,192 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1845 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:03,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1845 Valid, 2520 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:37:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5858 states. [2022-11-03 02:37:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5858 to 4026. [2022-11-03 02:37:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 1.311055900621118) internal successors, (5277), 4025 states have internal predecessors, (5277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 5277 transitions. [2022-11-03 02:37:05,188 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 5277 transitions. Word has length 69 [2022-11-03 02:37:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:05,188 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 5277 transitions. [2022-11-03 02:37:05,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 5277 transitions. [2022-11-03 02:37:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:37:05,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:05,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:05,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:37:05,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:05,405 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:37:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1092583132, now seen corresponding path program 1 times [2022-11-03 02:37:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:37:05,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720784297] [2022-11-03 02:37:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:05,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:37:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:06,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:06,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720784297] [2022-11-03 02:37:06,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720784297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:06,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534423141] [2022-11-03 02:37:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:06,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:06,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:06,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:06,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:37:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:06,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:37:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:08,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:14,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534423141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:14,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816881062] [2022-11-03 02:37:14,174 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2022-11-03 02:37:14,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:14,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:14,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:14,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:14,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:37:14,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:37:14,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:37:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:37:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:37:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:37:14,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:38:03,380 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:39:56,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257450#(and (= ~__return_1867~0 0) (= ~__return_2409~0 0) (= ~__return_1391~0 0) (= ~__return_1231~0 0) (<= 1 ~__return_1191~0) (= ~__return_1221~0 0) (<= ~send3~0 127) (= ~__return_1371~0 0) (<= 0 ~id3~0) (<= (+ |ULTIMATE.start_main_~node1__m1~64#1| 1) 0) (= ~__return_1281~0 0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~37#1| 1) 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~13#1| 127) (= ~__return_1401~0 0) (= ~__return_1451~0 0) (<= 1 ~__return_103~0) (<= 1 ~__return_2215~0) (= ~__return_4237~0 0) (<= ~st3~0 0) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1|) (= ~__return_1331~0 0) (= ~__return_1181~0 0) (<= 0 (+ ~p1_old~0 1)) (= ~__return_1461~0 0) (= ~__return_1241~0 0) (= ~__return_1571~0 0) (<= 0 ~id1~0) (= ~__return_4374~0 0) (= ~__return_1291~0 0) (= |ULTIMATE.start_main_~check__tmp~69#1| 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_1381~0 0) (= ~__return_1471~0 0) (= ~__return_1121~0 0) (= ~__return_1421~0 0) (= ~__return_1271~0 0) (= ~__return_1171~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~43#1| 1)) (= ~__return_1101~0 0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (= ~__return_3325~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~36#1| 1)) (= ~__return_3264~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~46#1| 1) 0) (= ~__return_2711~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~46#1| 1)) (= ~__return_1441~0 0) (= ~__return_1141~0 0) (<= ~mode2~0 1) (= ~__return_1491~0 0) (<= 0 ~st1~0) (<= ~__return_1191~0 1) (= |ULTIMATE.start_main_~check__tmp~67#1| 1) (<= |ULTIMATE.start_main_~assert__arg~68#1| 1) (<= ~__return_103~0 1) (<= 0 ~st2~0) (= ~__return_2299~0 0) (= ~__return_1341~0 0) (<= ~mode3~0 1) (= ~__return_1311~0 0) (= ~__return_1251~0 0) (= ~__return_3177~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~37#1| 1)) (= ~__return_1321~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~66#1|) (<= 0 ~send2~0) (= ~__return_3610~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= 0 (+ ~p2_old~0 1)) (= ~__return_1551~0 0) (<= ~id1~0 127) (= ~__return_1151~0 0) (= ~__return_1531~0 0) (= ~__return_4015~0 0) (= ~__return_4126~0 0) (= ~__return_3499~0 0) (= ~__return_1301~0 0) (<= |ULTIMATE.start_main_~assert__arg~66#1| 1) (= ~__return_1561~0 0) (= ~__return_1131~0 0) (<= ~send2~0 127) (= ~__return_2650~0 0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ ~p2_new~0 1)) (= ~__return_1351~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (= ~__return_1431~0 0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~44#1| 1)) (= ~__return_2798~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= |ULTIMATE.start_main_~__tmp_67~0#1| 1) (<= ~__return_5061~0 1) (<= ~st2~0 0) (= ~__return_3817~0 0) (<= (+ ~p2_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~47#1| 1)) (= ~__return_1261~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~64#1| 1)) (<= (+ |ULTIMATE.start_main_~node3__m3~43#1| 1) 0) (= ~__return_1201~0 0) (= ~__return_2885~0 0) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~10#1| 127) (= ~__return_1481~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_2563~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_69~0#1|) (<= ~id3~0 127) (= ~__return_1501~0 0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= ~__return_1521~0 0) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~13#1|) (<= ~__return_2215~0 1) (= ~__return_1361~0 0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= |ULTIMATE.start_main_~__tmp_69~0#1| 1) (<= 0 |ULTIMATE.start_main_~assert__arg~68#1|) (= ~__return_2061~0 0) (<= (+ ~p3_new~0 1) 0) (= ~__return_1211~0 0) (= ~__return_1161~0 0) (= ~__return_1951~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~47#1| 1) 0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= ~__return_3928~0 0) (<= (+ ~p1_old~0 1) 0) (<= |ULTIMATE.start_main_~check__tmp~58#1| 1) (<= 0 ~send3~0) (= ~p1~0 0) (= ~__return_1541~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~__tmp_67~0#1|) (= ~__return_main~0 0) (= ~__return_3412~0 0) (<= (+ |ULTIMATE.start_main_~node2__m2~36#1| 1) 0) (<= (+ |ULTIMATE.start_main_~node3__m3~44#1| 1) 0) (= ~__return_2996~0 0) (= ~__return_1111~0 0) (= ~__return_1511~0 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= ~__return_1411~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-03 02:39:56,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:39:56,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:39:56,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-11-03 02:39:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070315862] [2022-11-03 02:39:56,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:56,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:39:56,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:39:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=6633, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 02:39:56,334 INFO L87 Difference]: Start difference. First operand 4026 states and 5277 transitions. Second operand has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 41 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:34,504 INFO L93 Difference]: Finished difference Result 18868 states and 25324 transitions. [2022-11-03 02:40:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-03 02:40:34,505 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 41 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-03 02:40:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:34,527 INFO L225 Difference]: With dead ends: 18868 [2022-11-03 02:40:34,527 INFO L226 Difference]: Without dead ends: 16709 [2022-11-03 02:40:34,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 125 SyntacticMatches, 12 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13649 ImplicationChecksByTransitivity, 133.4s TimeCoverageRelationStatistics Valid=3418, Invalid=28444, Unknown=0, NotChecked=0, Total=31862 [2022-11-03 02:40:34,541 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 4870 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 5098 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4870 SdHoareTripleChecker+Valid, 4621 SdHoareTripleChecker+Invalid, 5744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 5098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:34,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4870 Valid, 4621 Invalid, 5744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 5098 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-03 02:40:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16709 states. [2022-11-03 02:40:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16709 to 7634. [2022-11-03 02:40:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7634 states, 7633 states have (on average 1.3139001703131141) internal successors, (10029), 7633 states have internal predecessors, (10029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7634 states to 7634 states and 10029 transitions. [2022-11-03 02:40:40,077 INFO L78 Accepts]: Start accepts. Automaton has 7634 states and 10029 transitions. Word has length 69 [2022-11-03 02:40:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:40,077 INFO L495 AbstractCegarLoop]: Abstraction has 7634 states and 10029 transitions. [2022-11-03 02:40:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.780487804878049) internal successors, (196), 41 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7634 states and 10029 transitions. [2022-11-03 02:40:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:40:40,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:40,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:40,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:40,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 02:40:40,309 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:40:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1048136402, now seen corresponding path program 1 times [2022-11-03 02:40:40,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307456435] [2022-11-03 02:40:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:40:40,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307456435] [2022-11-03 02:40:40,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307456435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:40,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:40,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:40:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938408864] [2022-11-03 02:40:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:40,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:40:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:40:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:40,610 INFO L87 Difference]: Start difference. First operand 7634 states and 10029 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:50,687 INFO L93 Difference]: Finished difference Result 12564 states and 16394 transitions. [2022-11-03 02:40:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:40:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-03 02:40:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:50,700 INFO L225 Difference]: With dead ends: 12564 [2022-11-03 02:40:50,700 INFO L226 Difference]: Without dead ends: 10818 [2022-11-03 02:40:50,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:40:50,704 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 1098 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:50,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 1416 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:40:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10818 states. [2022-11-03 02:40:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10818 to 7615. [2022-11-03 02:40:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 1.3142894667717362) internal successors, (10007), 7614 states have internal predecessors, (10007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 10007 transitions. [2022-11-03 02:40:55,611 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 10007 transitions. Word has length 70 [2022-11-03 02:40:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:55,612 INFO L495 AbstractCegarLoop]: Abstraction has 7615 states and 10007 transitions. [2022-11-03 02:40:55,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 10007 transitions. [2022-11-03 02:40:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:40:55,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:55,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:55,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 02:40:55,616 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:40:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -517315488, now seen corresponding path program 1 times [2022-11-03 02:40:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:55,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561575385] [2022-11-03 02:40:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:56,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561575385] [2022-11-03 02:40:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561575385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155212440] [2022-11-03 02:40:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:56,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:56,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:56,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:56,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:40:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:40:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:40:58,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:58,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155212440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:58,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:40:58,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 27 [2022-11-03 02:40:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482764321] [2022-11-03 02:40:58,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:58,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:40:58,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:40:58,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:40:58,143 INFO L87 Difference]: Start difference. First operand 7615 states and 10007 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:09,727 INFO L93 Difference]: Finished difference Result 13984 states and 18364 transitions. [2022-11-03 02:41:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:41:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 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 71 [2022-11-03 02:41:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:09,745 INFO L225 Difference]: With dead ends: 13984 [2022-11-03 02:41:09,745 INFO L226 Difference]: Without dead ends: 12259 [2022-11-03 02:41:09,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:41:09,749 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 2109 mSDsluCounter, 3021 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2109 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:09,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2109 Valid, 3412 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:41:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12259 states. [2022-11-03 02:41:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12259 to 7860. [2022-11-03 02:41:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7860 states, 7859 states have (on average 1.3144165924417865) internal successors, (10330), 7859 states have internal predecessors, (10330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7860 states to 7860 states and 10330 transitions. [2022-11-03 02:41:15,253 INFO L78 Accepts]: Start accepts. Automaton has 7860 states and 10330 transitions. Word has length 71 [2022-11-03 02:41:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:15,253 INFO L495 AbstractCegarLoop]: Abstraction has 7860 states and 10330 transitions. [2022-11-03 02:41:15,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 7860 states and 10330 transitions. [2022-11-03 02:41:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:41:15,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:15,256 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] [2022-11-03 02:41:15,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:15,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:41:15,456 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:41:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 412284185, now seen corresponding path program 1 times [2022-11-03 02:41:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:15,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033222112] [2022-11-03 02:41:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:15,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:15,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:15,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033222112] [2022-11-03 02:41:15,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033222112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:15,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:15,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098338156] [2022-11-03 02:41:15,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:15,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:15,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:15,566 INFO L87 Difference]: Start difference. First operand 7860 states and 10330 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:21,803 INFO L93 Difference]: Finished difference Result 11623 states and 15463 transitions. [2022-11-03 02:41:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-03 02:41:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:21,814 INFO L225 Difference]: With dead ends: 11623 [2022-11-03 02:41:21,815 INFO L226 Difference]: Without dead ends: 10309 [2022-11-03 02:41:21,818 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 [2022-11-03 02:41:21,818 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 203 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:21,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 587 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10309 states. [2022-11-03 02:41:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10309 to 9762. [2022-11-03 02:41:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 1.308882286650958) internal successors, (12776), 9761 states have internal predecessors, (12776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 12776 transitions. [2022-11-03 02:41:27,601 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 12776 transitions. Word has length 71 [2022-11-03 02:41:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:27,601 INFO L495 AbstractCegarLoop]: Abstraction has 9762 states and 12776 transitions. [2022-11-03 02:41:27,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 12776 transitions. [2022-11-03 02:41:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:41:27,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:27,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:27,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 02:41:27,603 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:41:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -941445832, now seen corresponding path program 1 times [2022-11-03 02:41:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:27,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92523594] [2022-11-03 02:41:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:41:27,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92523594] [2022-11-03 02:41:27,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92523594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:27,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:27,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426942250] [2022-11-03 02:41:27,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:27,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:27,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:27,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:27,660 INFO L87 Difference]: Start difference. First operand 9762 states and 12776 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:34,620 INFO L93 Difference]: Finished difference Result 12087 states and 15797 transitions. [2022-11-03 02:41:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:34,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 73 [2022-11-03 02:41:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:34,633 INFO L225 Difference]: With dead ends: 12087 [2022-11-03 02:41:34,633 INFO L226 Difference]: Without dead ends: 9072 [2022-11-03 02:41:34,637 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 [2022-11-03 02:41:34,638 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 135 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:34,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 605 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9072 states. [2022-11-03 02:41:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9072 to 9069. [2022-11-03 02:41:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 1.296647551830613) internal successors, (11758), 9068 states have internal predecessors, (11758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 11758 transitions. [2022-11-03 02:41:41,633 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 11758 transitions. Word has length 73 [2022-11-03 02:41:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:41,633 INFO L495 AbstractCegarLoop]: Abstraction has 9069 states and 11758 transitions. [2022-11-03 02:41:41,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 11758 transitions. [2022-11-03 02:41:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:41:41,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:41,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:41,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 02:41:41,636 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:41:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1820853900, now seen corresponding path program 1 times [2022-11-03 02:41:41,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:41,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106375575] [2022-11-03 02:41:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:41:41,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106375575] [2022-11-03 02:41:41,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106375575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:41,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:41,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:41,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861308097] [2022-11-03 02:41:41,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:41,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:41,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:41,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:41,728 INFO L87 Difference]: Start difference. First operand 9069 states and 11758 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:51,931 INFO L93 Difference]: Finished difference Result 17929 states and 23296 transitions. [2022-11-03 02:41:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 74 [2022-11-03 02:41:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:51,949 INFO L225 Difference]: With dead ends: 17929 [2022-11-03 02:41:51,949 INFO L226 Difference]: Without dead ends: 12179 [2022-11-03 02:41:51,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:51,958 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 305 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:51,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 590 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:41:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12179 states. [2022-11-03 02:42:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12179 to 10038. [2022-11-03 02:42:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10038 states, 10037 states have (on average 1.2756799840589819) internal successors, (12804), 10037 states have internal predecessors, (12804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10038 states to 10038 states and 12804 transitions. [2022-11-03 02:42:00,608 INFO L78 Accepts]: Start accepts. Automaton has 10038 states and 12804 transitions. Word has length 74 [2022-11-03 02:42:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:00,609 INFO L495 AbstractCegarLoop]: Abstraction has 10038 states and 12804 transitions. [2022-11-03 02:42:00,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10038 states and 12804 transitions. [2022-11-03 02:42:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:42:00,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:00,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 02:42:00,611 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:42:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash -847364941, now seen corresponding path program 1 times [2022-11-03 02:42:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318138636] [2022-11-03 02:42:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:00,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:01,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318138636] [2022-11-03 02:42:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318138636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849149647] [2022-11-03 02:42:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:01,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:01,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:01,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:42:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:42:01,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:07,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:24,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849149647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808912364] [2022-11-03 02:42:24,475 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-03 02:42:24,476 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:42:24,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:42:24,477 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:42:24,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:42:24,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:42:24,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:42:24,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:24,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:24,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:42:50,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:27,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '484805#(and (= ~__return_1867~0 0) (= ~__return_2409~0 0) (= ~__return_1391~0 0) (= ~__return_1231~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_22~0#1|) (= |ULTIMATE.start_main_~check__tmp~21#1| 1) (<= 0 ~id3~0) (<= 0 |ULTIMATE.start_main_~assert__arg~49#1|) (= ~__return_1281~0 0) (<= 0 (+ ~p3_new~0 1)) (= ~__return_1401~0 0) (= ~__return_1451~0 0) (<= 1 ~__return_103~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~13#1|) (= ~__return_1331~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~11#1| 1) 0) (= ~__return_1181~0 0) (= ~__return_1461~0 0) (= ~__return_1241~0 0) (= ~__return_1571~0 0) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~45#1| 1)) (= ~__return_4374~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~19#1| 1)) (<= ~__return_3325~0 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 1 ~r1~0) (= ~__return_1381~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~19#1| 1) 0) (= ~__return_1471~0 0) (= ~__return_1121~0 0) (= ~__return_1421~0 0) (= ~__return_1271~0 0) (= ~__return_1171~0 0) (<= 0 |ULTIMATE.start_main_~__tmp_50~0#1|) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~31#1| 1)) (<= 0 |ULTIMATE.start_main_~assert__arg~21#1|) (<= ~send1~0 127) (<= ~st1~0 0) (= ~__return_3264~0 0) (= ~__return_2711~0 0) (= ~__return_1441~0 0) (<= 0 (+ ~p3_old~0 1)) (= ~__return_1141~0 0) (<= 1 ~__return_3325~0) (<= ~mode2~0 1) (= ~__return_1491~0 0) (<= 0 ~st1~0) (<= ~r1~0 257) (<= ~__return_103~0 1) (<= 0 ~st2~0) (<= ~__return_1521~0 1) (<= ~mode3~0 1) (= ~__return_1311~0 0) (= ~__return_1251~0 0) (= ~__return_3177~0 0) (= ~__return_1321~0 0) (<= 0 ~__return_2299~0) (= ~__return_3610~0 0) (<= ~__return_1371~0 0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (= ~__return_1551~0 0) (<= ~id1~0 127) (= ~__return_1531~0 0) (<= (+ ~p3_old~0 1) 0) (= ~__return_4015~0 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~34#1| 1)) (= ~__return_3499~0 0) (= ~__return_1561~0 0) (<= |ULTIMATE.start_main_~__tmp_50~0#1| 1) (<= ~__return_1191~0 0) (<= 0 ~__return_1101~0) (= ~__return_1131~0 0) (<= |ULTIMATE.start_main_~assert__arg~49#1| 1) (<= ~__return_1301~0 0) (<= ~__return_3928~0 0) (<= 0 ~__return_1371~0) (= ~__return_2650~0 0) (= |ULTIMATE.start_main_~check__tmp~49#1| 1) (<= 0 ~__return_1351~0) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (= ~__return_1431~0 0) (= ~__return_2798~0 0) (<= ~__return_1221~0 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~__return_5061~0 1) (= ~__return_3817~0 0) (<= (+ ~p2_new~0 1) 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~13#1| 127) (<= 0 ~__return_1211~0) (<= ~__return_1361~0 0) (<= 0 ~__return_1221~0) (<= ~__return_1101~0 0) (= ~__return_1261~0 0) (<= (+ |ULTIMATE.start_main_~node1__m1~45#1| 1) 0) (<= 0 ~__return_4237~0) (= ~__return_1201~0 0) (<= ~__return_1211~0 0) (<= |ULTIMATE.start_main_~assert__arg~21#1| 1) (= ~__return_2885~0 0) (= ~__return_1481~0 0) (<= ~__return_1341~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~1#1|) (= ~__return_2563~0 0) (<= ~id3~0 127) (<= ~__return_2299~0 0) (<= ~__return_1151~0 0) (<= 0 ~__return_2215~0) (= ~__return_1501~0 0) (<= ~__return_1351~0 0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= (+ |ULTIMATE.start_main_~node2__m2~34#1| 1) 0) (<= ~__return_4237~0 0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~__return_4126~0 0) (<= 0 ~__return_1291~0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~__tmp_22~0#1| 1) (<= 1 ~__return_1521~0) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (= ~__return_2061~0 0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~__return_1161~0 0) (= ~__return_1951~0 0) (= ~p3~0 0) (<= 0 ~__return_4126~0) (<= 0 (+ ~p1_new~0 1)) (<= ~__return_2215~0 0) (<= 0 ~__return_1191~0) (<= |ULTIMATE.start_main_~check__tmp~58#1| 1) (<= 0 ~__return_1341~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~__return_3928~0) (= ~p1~0 0) (= ~__return_1541~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= ~__return_1291~0 0) (= ~__return_main~0 0) (<= 0 ~__return_1151~0) (= ~__return_3412~0 0) (<= 0 ~__return_1301~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~11#1| 1)) (<= 0 ~__return_1361~0) (= ~__return_2996~0 0) (= ~__return_1111~0 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= (+ |ULTIMATE.start_main_~node3__m3~31#1| 1) 0) (= ~__return_1511~0 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~__tmp_2~0#1|) (= ~__return_1411~0 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-03 02:45:27,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:45:27,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:45:27,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 59 [2022-11-03 02:45:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520370488] [2022-11-03 02:45:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:27,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 02:45:27,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 02:45:27,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2022-11-03 02:45:27,153 INFO L87 Difference]: Start difference. First operand 10038 states and 12804 transitions. Second operand has 59 states, 59 states have (on average 3.711864406779661) internal successors, (219), 59 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:45,906 INFO L93 Difference]: Finished difference Result 28316 states and 36350 transitions. [2022-11-03 02:47:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2022-11-03 02:47:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.711864406779661) internal successors, (219), 59 states have internal predecessors, (219), 0 states have call successors, (0), 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 74 [2022-11-03 02:47:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:45,939 INFO L225 Difference]: With dead ends: 28316 [2022-11-03 02:47:45,939 INFO L226 Difference]: Without dead ends: 25712 [2022-11-03 02:47:45,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 119 SyntacticMatches, 12 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54686 ImplicationChecksByTransitivity, 265.1s TimeCoverageRelationStatistics Valid=12080, Invalid=111472, Unknown=0, NotChecked=0, Total=123552 [2022-11-03 02:47:45,955 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 7123 mSDsluCounter, 3964 mSDsCounter, 0 mSdLazyCounter, 8829 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7123 SdHoareTripleChecker+Valid, 4255 SdHoareTripleChecker+Invalid, 9919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 8829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:45,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7123 Valid, 4255 Invalid, 9919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1090 Valid, 8829 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2022-11-03 02:47:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2022-11-03 02:47:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 14968. [2022-11-03 02:47:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14968 states, 14967 states have (on average 1.2693258502037816) internal successors, (18998), 14967 states have internal predecessors, (18998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14968 states to 14968 states and 18998 transitions. [2022-11-03 02:47:57,524 INFO L78 Accepts]: Start accepts. Automaton has 14968 states and 18998 transitions. Word has length 74 [2022-11-03 02:47:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:57,524 INFO L495 AbstractCegarLoop]: Abstraction has 14968 states and 18998 transitions. [2022-11-03 02:47:57,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.711864406779661) internal successors, (219), 59 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 14968 states and 18998 transitions. [2022-11-03 02:47:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:47:57,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:57,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:57,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:57,741 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:47:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2020290141, now seen corresponding path program 1 times [2022-11-03 02:47:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:57,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629558589] [2022-11-03 02:47:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:57,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629558589] [2022-11-03 02:47:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629558589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:57,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:57,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:47:57,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193862045] [2022-11-03 02:47:57,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:57,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:57,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:47:57,948 INFO L87 Difference]: Start difference. First operand 14968 states and 18998 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:13,051 INFO L93 Difference]: Finished difference Result 19620 states and 24858 transitions. [2022-11-03 02:48:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:48:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 74 [2022-11-03 02:48:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:13,071 INFO L225 Difference]: With dead ends: 19620 [2022-11-03 02:48:13,071 INFO L226 Difference]: Without dead ends: 17032 [2022-11-03 02:48:13,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:48:13,077 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1340 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:13,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 641 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:48:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17032 states. [2022-11-03 02:48:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17032 to 14968. [2022-11-03 02:48:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14968 states, 14967 states have (on average 1.2692590365470702) internal successors, (18997), 14967 states have internal predecessors, (18997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14968 states to 14968 states and 18997 transitions. [2022-11-03 02:48:25,109 INFO L78 Accepts]: Start accepts. Automaton has 14968 states and 18997 transitions. Word has length 74 [2022-11-03 02:48:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:25,109 INFO L495 AbstractCegarLoop]: Abstraction has 14968 states and 18997 transitions. [2022-11-03 02:48:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 14968 states and 18997 transitions. [2022-11-03 02:48:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:48:25,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:25,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-03 02:48:25,111 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 02:48:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -446666058, now seen corresponding path program 1 times [2022-11-03 02:48:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:25,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483102902] [2022-11-03 02:48:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:25,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483102902] [2022-11-03 02:48:25,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483102902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979927413] [2022-11-03 02:48:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:25,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:25,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:25,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d90184-e892-476f-88cc-23312f3975b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:48:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:26,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:48:26,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:28,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979927413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:28,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575290729] [2022-11-03 02:48:28,659 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:48:28,659 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:28,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:28,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:28,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:48:28,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:28,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:28,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:48:30,518 INFO L180 IcfgInterpreter]: Interpretation finished