./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7 --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 7853b3826176a0fe575c35877885ca2c640283bf6a2200e21b7819452b726d2c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:17:14,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:17:14,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:17:14,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:17:14,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:17:14,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:17:14,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:17:14,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:17:14,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:17:14,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:17:14,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:17:14,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:17:14,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:17:14,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:17:14,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:17:14,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:17:14,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:17:14,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:17:14,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:17:14,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:17:14,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:17:14,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:17:14,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:17:14,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:17:14,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:17:14,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:17:14,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:17:14,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:17:14,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:17:14,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:17:14,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:17:14,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:17:14,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:17:14,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:17:14,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:17:14,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:17:14,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:17:14,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:17:14,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:17:14,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:17:14,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:17:14,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:17:14,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:17:14,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:17:14,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:17:14,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:17:14,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:17:14,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:17:14,401 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:17:14,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:17:14,401 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:17:14,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:17:14,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:17:14,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:17:14,404 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:17:14,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:17:14,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:17:14,405 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:17:14,405 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:17:14,405 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:17:14,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:17:14,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:17:14,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:17:14,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:17:14,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:17:14,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:17:14,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:17:14,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:17:14,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:17:14,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:17:14,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:17:14,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:17:14,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:17:14,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:17:14,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:17:14,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:17:14,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:17:14,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:17:14,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:17:14,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:17:14,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:17:14,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:17:14,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:17:14,415 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7853b3826176a0fe575c35877885ca2c640283bf6a2200e21b7819452b726d2c [2021-11-25 20:17:14,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:17:14,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:17:14,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:17:14,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:17:14,834 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:17:14,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-25 20:17:14,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/data/69efb2375/41b6bf6876ce4d71a9578edc6d7a03e3/FLAG6a6013a4c [2021-11-25 20:17:16,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:17:16,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-25 20:17:16,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/data/69efb2375/41b6bf6876ce4d71a9578edc6d7a03e3/FLAG6a6013a4c [2021-11-25 20:17:16,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/data/69efb2375/41b6bf6876ce4d71a9578edc6d7a03e3 [2021-11-25 20:17:16,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:17:16,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:17:16,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:17:16,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:17:16,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:17:16,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:17:16" (1/1) ... [2021-11-25 20:17:16,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653e8bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:16, skipping insertion in model container [2021-11-25 20:17:16,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:17:16" (1/1) ... [2021-11-25 20:17:16,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:17:16,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:17:17,603 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[28933,28946] [2021-11-25 20:17:17,761 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[50969,50982] [2021-11-25 20:17:17,791 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58695,58708] [2021-11-25 20:17:17,899 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83802,83815] [2021-11-25 20:17:17,956 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98975,98988] [2021-11-25 20:17:18,015 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115686,115699] [2021-11-25 20:17:18,073 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[132053,132066] [2021-11-25 20:17:18,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:17:18,372 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:17:18,501 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[28933,28946] [2021-11-25 20:17:18,560 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[50969,50982] [2021-11-25 20:17:18,582 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[58695,58708] [2021-11-25 20:17:18,655 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[83802,83815] [2021-11-25 20:17:18,695 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[98975,98988] [2021-11-25 20:17:18,745 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[115686,115699] [2021-11-25 20:17:18,788 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_95db90e7-5ccc-4999-981d-847101216014/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[132053,132066] [2021-11-25 20:17:19,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:17:19,074 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:17:19,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19 WrapperNode [2021-11-25 20:17:19,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:17:19,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:17:19,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:17:19,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:17:19,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,395 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9191 [2021-11-25 20:17:19,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:17:19,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:17:19,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:17:19,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:17:19,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:17:19,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:17:19,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:17:19,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:17:19,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (1/1) ... [2021-11-25 20:17:19,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:17:19,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:19,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:17:19,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95db90e7-5ccc-4999-981d-847101216014/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:17:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:17:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:17:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:17:19,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:17:20,234 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:17:20,236 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:17:24,878 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:17:25,894 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:17:25,895 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:17:25,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:17:25 BoogieIcfgContainer [2021-11-25 20:17:25,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:17:25,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:17:25,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:17:25,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:17:25,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:17:16" (1/3) ... [2021-11-25 20:17:25,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4082042b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:17:25, skipping insertion in model container [2021-11-25 20:17:25,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:19" (2/3) ... [2021-11-25 20:17:25,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4082042b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:17:25, skipping insertion in model container [2021-11-25 20:17:25,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:17:25" (3/3) ... [2021-11-25 20:17:25,916 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-25 20:17:25,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:17:25,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-25 20:17:25,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:17:26,005 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:17:26,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-25 20:17:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 1926 states, 1918 states have (on average 1.802398331595412) internal successors, (3457), 1925 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 20:17:26,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:26,131 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:26,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1031762117, now seen corresponding path program 1 times [2021-11-25 20:17:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:26,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780703623] [2021-11-25 20:17:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:26,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:26,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:26,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780703623] [2021-11-25 20:17:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780703623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:26,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:26,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:26,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244813706] [2021-11-25 20:17:26,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:26,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:17:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:17:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:26,907 INFO L87 Difference]: Start difference. First operand has 1926 states, 1918 states have (on average 1.802398331595412) internal successors, (3457), 1925 states have internal predecessors, (3457), 0 states have call successors, (0), 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 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:29,538 INFO L93 Difference]: Finished difference Result 3061 states and 5392 transitions. [2021-11-25 20:17:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:29,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-25 20:17:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:29,575 INFO L225 Difference]: With dead ends: 3061 [2021-11-25 20:17:29,576 INFO L226 Difference]: Without dead ends: 1954 [2021-11-25 20:17:29,585 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:17:29,589 INFO L933 BasicCegarLoop]: 1546 mSDtfsCounter, 9471 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9471 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:29,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9471 Valid, 1950 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:17:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-11-25 20:17:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1941. [2021-11-25 20:17:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1934 states have (on average 1.31282316442606) internal successors, (2539), 1940 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2539 transitions. [2021-11-25 20:17:29,813 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2539 transitions. Word has length 63 [2021-11-25 20:17:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:29,814 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2539 transitions. [2021-11-25 20:17:29,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2539 transitions. [2021-11-25 20:17:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 20:17:29,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:29,822 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:29,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:17:29,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 505276640, now seen corresponding path program 1 times [2021-11-25 20:17:29,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775572109] [2021-11-25 20:17:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:29,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:30,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:30,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775572109] [2021-11-25 20:17:30,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775572109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:30,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:30,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:30,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149418938] [2021-11-25 20:17:30,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:30,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:17:30,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:17:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:30,018 INFO L87 Difference]: Start difference. First operand 1941 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:32,187 INFO L93 Difference]: Finished difference Result 3913 states and 5187 transitions. [2021-11-25 20:17:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:32,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-25 20:17:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:32,207 INFO L225 Difference]: With dead ends: 3913 [2021-11-25 20:17:32,207 INFO L226 Difference]: Without dead ends: 2630 [2021-11-25 20:17:32,211 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:17:32,213 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 7282 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7282 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:32,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7282 Valid, 1275 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 20:17:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-11-25 20:17:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2624. [2021-11-25 20:17:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2617 states have (on average 1.3129537638517386) internal successors, (3436), 2623 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3436 transitions. [2021-11-25 20:17:32,435 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3436 transitions. Word has length 64 [2021-11-25 20:17:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:32,436 INFO L470 AbstractCegarLoop]: Abstraction has 2624 states and 3436 transitions. [2021-11-25 20:17:32,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3436 transitions. [2021-11-25 20:17:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 20:17:32,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:32,449 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:17:32,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash 285379470, now seen corresponding path program 1 times [2021-11-25 20:17:32,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:32,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144009586] [2021-11-25 20:17:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:32,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:32,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:32,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144009586] [2021-11-25 20:17:32,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144009586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:32,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:32,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:32,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997852547] [2021-11-25 20:17:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:32,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:17:32,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:17:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:32,639 INFO L87 Difference]: Start difference. First operand 2624 states and 3436 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:34,699 INFO L93 Difference]: Finished difference Result 5369 states and 7049 transitions. [2021-11-25 20:17:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-25 20:17:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:34,726 INFO L225 Difference]: With dead ends: 5369 [2021-11-25 20:17:34,726 INFO L226 Difference]: Without dead ends: 3528 [2021-11-25 20:17:34,731 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:17:34,739 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 6792 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6792 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:34,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6792 Valid, 1191 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:17:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-25 20:17:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3514. [2021-11-25 20:17:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3507 states have (on average 1.2959794696321643) internal successors, (4545), 3513 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4545 transitions. [2021-11-25 20:17:35,042 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4545 transitions. Word has length 64 [2021-11-25 20:17:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:35,045 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4545 transitions. [2021-11-25 20:17:35,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4545 transitions. [2021-11-25 20:17:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:17:35,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:35,057 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:35,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:17:35,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -874930976, now seen corresponding path program 1 times [2021-11-25 20:17:35,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:35,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596046166] [2021-11-25 20:17:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:35,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:35,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596046166] [2021-11-25 20:17:35,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596046166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:35,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:35,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:17:35,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945466072] [2021-11-25 20:17:35,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:35,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:17:35,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:17:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:17:35,367 INFO L87 Difference]: Start difference. First operand 3514 states and 4545 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) [2021-11-25 20:17:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:39,362 INFO L93 Difference]: Finished difference Result 4102 states and 5321 transitions. [2021-11-25 20:17:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:17:39,363 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 65 [2021-11-25 20:17:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:39,393 INFO L225 Difference]: With dead ends: 4102 [2021-11-25 20:17:39,393 INFO L226 Difference]: Without dead ends: 4097 [2021-11-25 20:17:39,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:17:39,399 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 6160 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 4912 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6160 SdHoareTripleChecker+Valid, 4421 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:39,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6160 Valid, 4421 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4912 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 20:17:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-11-25 20:17:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3514. [2021-11-25 20:17:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3507 states have (on average 1.2956943256344453) internal successors, (4544), 3513 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4544 transitions. [2021-11-25 20:17:39,645 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4544 transitions. Word has length 65 [2021-11-25 20:17:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:39,648 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4544 transitions. [2021-11-25 20:17:39,649 INFO L471 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) [2021-11-25 20:17:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4544 transitions. [2021-11-25 20:17:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:17:39,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:39,658 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:39,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:17:39,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash -428617911, now seen corresponding path program 1 times [2021-11-25 20:17:39,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:39,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317590930] [2021-11-25 20:17:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:39,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:39,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317590930] [2021-11-25 20:17:39,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317590930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:39,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:39,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:17:39,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445321219] [2021-11-25 20:17:40,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:40,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:17:40,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:17:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:17:40,005 INFO L87 Difference]: Start difference. First operand 3514 states and 4544 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 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) [2021-11-25 20:17:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:46,342 INFO L93 Difference]: Finished difference Result 5765 states and 7628 transitions. [2021-11-25 20:17:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:17:46,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 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 65 [2021-11-25 20:17:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:46,377 INFO L225 Difference]: With dead ends: 5765 [2021-11-25 20:17:46,378 INFO L226 Difference]: Without dead ends: 5208 [2021-11-25 20:17:46,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:17:46,383 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 6744 mSDsluCounter, 4880 mSDsCounter, 0 mSdLazyCounter, 6907 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6744 SdHoareTripleChecker+Valid, 5847 SdHoareTripleChecker+Invalid, 6933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:46,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6744 Valid, 5847 Invalid, 6933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6907 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 20:17:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-11-25 20:17:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 3521. [2021-11-25 20:17:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 3514 states have (on average 1.2951052931132612) internal successors, (4551), 3520 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 4551 transitions. [2021-11-25 20:17:46,738 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 4551 transitions. Word has length 65 [2021-11-25 20:17:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:46,739 INFO L470 AbstractCegarLoop]: Abstraction has 3521 states and 4551 transitions. [2021-11-25 20:17:46,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 8 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) [2021-11-25 20:17:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 4551 transitions. [2021-11-25 20:17:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:17:46,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:46,751 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:46,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:17:46,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2016295323, now seen corresponding path program 1 times [2021-11-25 20:17:46,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:46,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627776153] [2021-11-25 20:17:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:46,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:47,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627776153] [2021-11-25 20:17:47,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627776153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:47,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:47,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:17:47,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478385674] [2021-11-25 20:17:47,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:47,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:17:47,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:17:47,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:17:47,468 INFO L87 Difference]: Start difference. First operand 3521 states and 4551 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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) [2021-11-25 20:17:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:53,630 INFO L93 Difference]: Finished difference Result 10847 states and 14782 transitions. [2021-11-25 20:17:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 20:17:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 [2021-11-25 20:17:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:53,704 INFO L225 Difference]: With dead ends: 10847 [2021-11-25 20:17:53,705 INFO L226 Difference]: Without dead ends: 10371 [2021-11-25 20:17:53,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 20:17:53,756 INFO L933 BasicCegarLoop]: 2125 mSDtfsCounter, 15150 mSDsluCounter, 12434 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15150 SdHoareTripleChecker+Valid, 14364 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:53,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15150 Valid, 14364 Invalid, 3416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [458 Valid, 2958 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 20:17:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2021-11-25 20:17:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 3481. [2021-11-25 20:17:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3475 states have (on average 1.2949640287769784) internal successors, (4500), 3480 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 4500 transitions. [2021-11-25 20:17:54,285 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 4500 transitions. Word has length 66 [2021-11-25 20:17:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 4500 transitions. [2021-11-25 20:17:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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) [2021-11-25 20:17:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 4500 transitions. [2021-11-25 20:17:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:17:54,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:54,297 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:54,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:17:54,297 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1740752215, now seen corresponding path program 1 times [2021-11-25 20:17:54,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:54,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418677756] [2021-11-25 20:17:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:54,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:54,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418677756] [2021-11-25 20:17:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418677756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:54,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:54,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:54,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902246263] [2021-11-25 20:17:54,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:54,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:17:54,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:17:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:54,409 INFO L87 Difference]: Start difference. First operand 3481 states and 4500 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-11-25 20:17:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:56,176 INFO L93 Difference]: Finished difference Result 6727 states and 8707 transitions. [2021-11-25 20:17:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 [2021-11-25 20:17:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:56,188 INFO L225 Difference]: With dead ends: 6727 [2021-11-25 20:17:56,188 INFO L226 Difference]: Without dead ends: 4463 [2021-11-25 20:17:56,193 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:17:56,194 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 5739 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5739 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:56,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5739 Valid, 1019 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:17:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-11-25 20:17:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4453. [2021-11-25 20:17:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4447 states have (on average 1.289183719361367) internal successors, (5733), 4452 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 5733 transitions. [2021-11-25 20:17:56,861 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 5733 transitions. Word has length 66 [2021-11-25 20:17:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:56,861 INFO L470 AbstractCegarLoop]: Abstraction has 4453 states and 5733 transitions. [2021-11-25 20:17:56,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) [2021-11-25 20:17:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 5733 transitions. [2021-11-25 20:17:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:17:56,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:56,872 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:17:56,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:17:56,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:17:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash -167816723, now seen corresponding path program 1 times [2021-11-25 20:17:56,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:56,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572132288] [2021-11-25 20:17:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:56,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:57,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572132288] [2021-11-25 20:17:57,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572132288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:57,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:57,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:17:57,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919402944] [2021-11-25 20:17:57,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:57,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:17:57,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:57,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:17:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:17:57,401 INFO L87 Difference]: Start difference. First operand 4453 states and 5733 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 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) [2021-11-25 20:18:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:03,537 INFO L93 Difference]: Finished difference Result 13912 states and 18943 transitions. [2021-11-25 20:18:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 20:18:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 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 [2021-11-25 20:18:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:03,578 INFO L225 Difference]: With dead ends: 13912 [2021-11-25 20:18:03,579 INFO L226 Difference]: Without dead ends: 13034 [2021-11-25 20:18:03,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=328, Invalid=1232, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 20:18:03,586 INFO L933 BasicCegarLoop]: 2026 mSDtfsCounter, 11916 mSDsluCounter, 12166 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11916 SdHoareTripleChecker+Valid, 13883 SdHoareTripleChecker+Invalid, 3304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:03,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11916 Valid, 13883 Invalid, 3304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 20:18:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13034 states. [2021-11-25 20:18:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13034 to 4393. [2021-11-25 20:18:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4388 states have (on average 1.2876025524156791) internal successors, (5650), 4392 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 5650 transitions. [2021-11-25 20:18:04,388 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 5650 transitions. Word has length 66 [2021-11-25 20:18:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:04,388 INFO L470 AbstractCegarLoop]: Abstraction has 4393 states and 5650 transitions. [2021-11-25 20:18:04,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 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) [2021-11-25 20:18:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 5650 transitions. [2021-11-25 20:18:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:18:04,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:04,403 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:04,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:18:04,404 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1849785436, now seen corresponding path program 1 times [2021-11-25 20:18:04,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320762845] [2021-11-25 20:18:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:04,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:04,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:04,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320762845] [2021-11-25 20:18:04,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320762845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:04,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:04,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:18:04,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72383465] [2021-11-25 20:18:04,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:04,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:18:04,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:18:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:18:04,619 INFO L87 Difference]: Start difference. First operand 4393 states and 5650 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 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) [2021-11-25 20:18:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:09,788 INFO L93 Difference]: Finished difference Result 8180 states and 10875 transitions. [2021-11-25 20:18:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:18:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 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 67 [2021-11-25 20:18:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:09,806 INFO L225 Difference]: With dead ends: 8180 [2021-11-25 20:18:09,806 INFO L226 Difference]: Without dead ends: 7327 [2021-11-25 20:18:09,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:18:09,812 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 6235 mSDsluCounter, 4061 mSDsCounter, 0 mSdLazyCounter, 5132 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6235 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 5132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:09,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6235 Valid, 5023 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 5132 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 20:18:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2021-11-25 20:18:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 4362. [2021-11-25 20:18:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4357 states have (on average 1.2871241680055083) internal successors, (5608), 4361 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 5608 transitions. [2021-11-25 20:18:10,716 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 5608 transitions. Word has length 67 [2021-11-25 20:18:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:10,716 INFO L470 AbstractCegarLoop]: Abstraction has 4362 states and 5608 transitions. [2021-11-25 20:18:10,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 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) [2021-11-25 20:18:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 5608 transitions. [2021-11-25 20:18:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:18:10,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:10,725 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:10,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:18:10,725 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2035786332, now seen corresponding path program 1 times [2021-11-25 20:18:10,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:10,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037994328] [2021-11-25 20:18:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:10,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:10,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037994328] [2021-11-25 20:18:10,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037994328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:10,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:10,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:18:10,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615957305] [2021-11-25 20:18:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:10,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:18:10,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:18:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:18:10,870 INFO L87 Difference]: Start difference. First operand 4362 states and 5608 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 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) [2021-11-25 20:18:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:14,448 INFO L93 Difference]: Finished difference Result 6208 states and 8056 transitions. [2021-11-25 20:18:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:18:14,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 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 68 [2021-11-25 20:18:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:14,465 INFO L225 Difference]: With dead ends: 6208 [2021-11-25 20:18:14,465 INFO L226 Difference]: Without dead ends: 6200 [2021-11-25 20:18:14,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:18:14,469 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 3897 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:14,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3897 Valid, 3286 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:18:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-11-25 20:18:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 4362. [2021-11-25 20:18:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4357 states have (on average 1.2868946522836815) internal successors, (5607), 4361 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 5607 transitions. [2021-11-25 20:18:15,272 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 5607 transitions. Word has length 68 [2021-11-25 20:18:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 4362 states and 5607 transitions. [2021-11-25 20:18:15,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 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) [2021-11-25 20:18:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 5607 transitions. [2021-11-25 20:18:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:18:15,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:15,282 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:15,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:18:15,283 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1784891832, now seen corresponding path program 1 times [2021-11-25 20:18:15,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:15,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660583855] [2021-11-25 20:18:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:15,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:15,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:15,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660583855] [2021-11-25 20:18:15,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660583855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:15,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:15,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:18:15,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993726839] [2021-11-25 20:18:15,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:15,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:18:15,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:18:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:18:15,814 INFO L87 Difference]: Start difference. First operand 4362 states and 5607 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) [2021-11-25 20:18:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:23,135 INFO L93 Difference]: Finished difference Result 12830 states and 17243 transitions. [2021-11-25 20:18:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 20:18:23,136 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 68 [2021-11-25 20:18:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:23,159 INFO L225 Difference]: With dead ends: 12830 [2021-11-25 20:18:23,160 INFO L226 Difference]: Without dead ends: 11974 [2021-11-25 20:18:23,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=324, Invalid=866, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 20:18:23,166 INFO L933 BasicCegarLoop]: 1598 mSDtfsCounter, 12547 mSDsluCounter, 9021 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12547 SdHoareTripleChecker+Valid, 10522 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12547 Valid, 10522 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 20:18:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-11-25 20:18:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 4372. [2021-11-25 20:18:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4367 states have (on average 1.2869246622395236) internal successors, (5620), 4371 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 5620 transitions. [2021-11-25 20:18:24,304 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 5620 transitions. Word has length 68 [2021-11-25 20:18:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:24,305 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 5620 transitions. [2021-11-25 20:18:24,305 INFO L471 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) [2021-11-25 20:18:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 5620 transitions. [2021-11-25 20:18:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:18:24,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:24,314 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:24,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:18:24,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -541441223, now seen corresponding path program 1 times [2021-11-25 20:18:24,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258459065] [2021-11-25 20:18:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:24,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:24,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258459065] [2021-11-25 20:18:24,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258459065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:24,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:24,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:18:24,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549816665] [2021-11-25 20:18:24,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:24,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:18:24,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:24,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:18:24,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:18:24,491 INFO L87 Difference]: Start difference. First operand 4372 states and 5620 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 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) [2021-11-25 20:18:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:28,673 INFO L93 Difference]: Finished difference Result 7389 states and 9804 transitions. [2021-11-25 20:18:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:18:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 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 [2021-11-25 20:18:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:28,683 INFO L225 Difference]: With dead ends: 7389 [2021-11-25 20:18:28,684 INFO L226 Difference]: Without dead ends: 6563 [2021-11-25 20:18:28,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:18:28,688 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 3844 mSDsluCounter, 2563 mSDsCounter, 0 mSdLazyCounter, 3647 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3844 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 3743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:28,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3844 Valid, 3371 Invalid, 3743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3647 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:18:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-11-25 20:18:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 4372. [2021-11-25 20:18:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4367 states have (on average 1.2864666819326769) internal successors, (5618), 4371 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 5618 transitions. [2021-11-25 20:18:29,620 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 5618 transitions. Word has length 69 [2021-11-25 20:18:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:29,620 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 5618 transitions. [2021-11-25 20:18:29,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 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) [2021-11-25 20:18:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 5618 transitions. [2021-11-25 20:18:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:18:29,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:29,629 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:29,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:18:29,630 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash -463393113, now seen corresponding path program 1 times [2021-11-25 20:18:29,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:29,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875063425] [2021-11-25 20:18:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:30,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875063425] [2021-11-25 20:18:30,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875063425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:30,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:30,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:18:30,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393625649] [2021-11-25 20:18:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:30,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:18:30,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:18:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:18:30,049 INFO L87 Difference]: Start difference. First operand 4372 states and 5618 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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) [2021-11-25 20:18:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:40,210 INFO L93 Difference]: Finished difference Result 15987 states and 21690 transitions. [2021-11-25 20:18:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 20:18:40,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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 [2021-11-25 20:18:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:40,230 INFO L225 Difference]: With dead ends: 15987 [2021-11-25 20:18:40,230 INFO L226 Difference]: Without dead ends: 15088 [2021-11-25 20:18:40,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 20:18:40,236 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 10706 mSDsluCounter, 9844 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10706 SdHoareTripleChecker+Valid, 11322 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:40,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10706 Valid, 11322 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:18:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15088 states. [2021-11-25 20:18:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15088 to 4382. [2021-11-25 20:18:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4377 states have (on average 1.2864976010966416) internal successors, (5631), 4381 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5631 transitions. [2021-11-25 20:18:41,304 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5631 transitions. Word has length 69 [2021-11-25 20:18:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:41,304 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5631 transitions. [2021-11-25 20:18:41,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 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) [2021-11-25 20:18:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5631 transitions. [2021-11-25 20:18:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:18:41,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:41,314 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:41,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:18:41,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1882503663, now seen corresponding path program 1 times [2021-11-25 20:18:41,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:41,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766238820] [2021-11-25 20:18:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:41,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:41,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:41,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766238820] [2021-11-25 20:18:41,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766238820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:41,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:41,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:18:41,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072340259] [2021-11-25 20:18:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:41,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:41,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:18:41,382 INFO L87 Difference]: Start difference. First operand 4382 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-25 20:18:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:42,887 INFO L93 Difference]: Finished difference Result 8460 states and 10958 transitions. [2021-11-25 20:18:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 [2021-11-25 20:18:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:42,894 INFO L225 Difference]: With dead ends: 8460 [2021-11-25 20:18:42,894 INFO L226 Difference]: Without dead ends: 5162 [2021-11-25 20:18:42,900 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:18:42,901 INFO L933 BasicCegarLoop]: 1358 mSDtfsCounter, 1360 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:42,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 1797 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:18:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-11-25 20:18:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 5152. [2021-11-25 20:18:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5152 states, 5148 states have (on average 1.2812742812742812) internal successors, (6596), 5151 states have internal predecessors, (6596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5152 states to 5152 states and 6596 transitions. [2021-11-25 20:18:44,390 INFO L78 Accepts]: Start accepts. Automaton has 5152 states and 6596 transitions. Word has length 69 [2021-11-25 20:18:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:44,390 INFO L470 AbstractCegarLoop]: Abstraction has 5152 states and 6596 transitions. [2021-11-25 20:18:44,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-25 20:18:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5152 states and 6596 transitions. [2021-11-25 20:18:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:18:44,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:44,399 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:44,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:18:44,400 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash 594946586, now seen corresponding path program 1 times [2021-11-25 20:18:44,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:44,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795114627] [2021-11-25 20:18:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:44,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:44,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795114627] [2021-11-25 20:18:44,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795114627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:44,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:44,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:18:44,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845574401] [2021-11-25 20:18:44,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:44,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:44,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:18:44,466 INFO L87 Difference]: Start difference. First operand 5152 states and 6596 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-25 20:18:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:46,332 INFO L93 Difference]: Finished difference Result 7802 states and 10194 transitions. [2021-11-25 20:18:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 [2021-11-25 20:18:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:46,338 INFO L225 Difference]: With dead ends: 7802 [2021-11-25 20:18:46,338 INFO L226 Difference]: Without dead ends: 4648 [2021-11-25 20:18:46,342 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:18:46,342 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 1011 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:46,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1404 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-11-25 20:18:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4644. [2021-11-25 20:18:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4642 states have (on average 1.2979319258940112) internal successors, (6025), 4643 states have internal predecessors, (6025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 6025 transitions. [2021-11-25 20:18:47,787 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 6025 transitions. Word has length 69 [2021-11-25 20:18:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:47,788 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 6025 transitions. [2021-11-25 20:18:47,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2021-11-25 20:18:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 6025 transitions. [2021-11-25 20:18:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:18:47,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:47,793 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:18:47,794 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2125971745, now seen corresponding path program 1 times [2021-11-25 20:18:47,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059773717] [2021-11-25 20:18:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:47,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:47,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:47,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059773717] [2021-11-25 20:18:47,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059773717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:47,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:47,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:18:47,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579512996] [2021-11-25 20:18:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:47,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:47,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:47,912 INFO L87 Difference]: Start difference. First operand 4644 states and 6025 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2021-11-25 20:18:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:50,859 INFO L93 Difference]: Finished difference Result 8497 states and 11493 transitions. [2021-11-25 20:18:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:18:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 [2021-11-25 20:18:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:50,867 INFO L225 Difference]: With dead ends: 8497 [2021-11-25 20:18:50,867 INFO L226 Difference]: Without dead ends: 6295 [2021-11-25 20:18:50,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:50,873 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 1898 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:50,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1898 Valid, 1764 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:18:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2021-11-25 20:18:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 5378. [2021-11-25 20:18:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 5376 states have (on average 1.341703869047619) internal successors, (7213), 5377 states have internal predecessors, (7213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:18:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 7213 transitions. [2021-11-25 20:18:53,117 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 7213 transitions. Word has length 69 [2021-11-25 20:18:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:53,117 INFO L470 AbstractCegarLoop]: Abstraction has 5378 states and 7213 transitions. [2021-11-25 20:18:53,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2021-11-25 20:18:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 7213 transitions. [2021-11-25 20:18:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:18:53,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:53,125 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:18:53,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:18:53,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:18:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1302640947, now seen corresponding path program 1 times [2021-11-25 20:18:53,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:53,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862593822] [2021-11-25 20:18:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:53,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:53,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:53,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862593822] [2021-11-25 20:18:53,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862593822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:53,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:53,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:18:53,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960891304] [2021-11-25 20:18:53,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:53,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:18:53,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:18:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:18:53,332 INFO L87 Difference]: Start difference. First operand 5378 states and 7213 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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) [2021-11-25 20:19:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:01,124 INFO L93 Difference]: Finished difference Result 11470 states and 15583 transitions. [2021-11-25 20:19:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:19:01,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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 70 [2021-11-25 20:19:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:01,137 INFO L225 Difference]: With dead ends: 11470 [2021-11-25 20:19:01,138 INFO L226 Difference]: Without dead ends: 10344 [2021-11-25 20:19:01,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:19:01,141 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 4132 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 3456 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4132 SdHoareTripleChecker+Valid, 3450 SdHoareTripleChecker+Invalid, 3565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:01,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4132 Valid, 3450 Invalid, 3565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3456 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:19:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10344 states. [2021-11-25 20:19:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10344 to 5378. [2021-11-25 20:19:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 5376 states have (on average 1.3415178571428572) internal successors, (7212), 5377 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 7212 transitions. [2021-11-25 20:19:03,403 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 7212 transitions. Word has length 70 [2021-11-25 20:19:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:03,403 INFO L470 AbstractCegarLoop]: Abstraction has 5378 states and 7212 transitions. [2021-11-25 20:19:03,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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) [2021-11-25 20:19:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 7212 transitions. [2021-11-25 20:19:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:19:03,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:03,409 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:19:03,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:19:03,409 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:19:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -30289550, now seen corresponding path program 1 times [2021-11-25 20:19:03,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241038558] [2021-11-25 20:19:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:03,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:03,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:03,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241038558] [2021-11-25 20:19:03,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241038558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:03,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:03,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:19:03,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176181585] [2021-11-25 20:19:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:03,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:19:03,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:19:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:19:03,586 INFO L87 Difference]: Start difference. First operand 5378 states and 7212 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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) [2021-11-25 20:19:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:09,567 INFO L93 Difference]: Finished difference Result 9259 states and 12460 transitions. [2021-11-25 20:19:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:19:09,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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 70 [2021-11-25 20:19:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:09,577 INFO L225 Difference]: With dead ends: 9259 [2021-11-25 20:19:09,578 INFO L226 Difference]: Without dead ends: 7963 [2021-11-25 20:19:09,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:19:09,581 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 2940 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2940 SdHoareTripleChecker+Valid, 2637 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:09,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2940 Valid, 2637 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2820 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 20:19:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7963 states. [2021-11-25 20:19:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7963 to 5378. [2021-11-25 20:19:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 5376 states have (on average 1.3413318452380953) internal successors, (7211), 5377 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 7211 transitions. [2021-11-25 20:19:11,900 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 7211 transitions. Word has length 70 [2021-11-25 20:19:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 5378 states and 7211 transitions. [2021-11-25 20:19:11,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 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) [2021-11-25 20:19:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 7211 transitions. [2021-11-25 20:19:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:19:11,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:11,908 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:19:11,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:19:11,909 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:19:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1966113785, now seen corresponding path program 1 times [2021-11-25 20:19:11,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:11,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217850613] [2021-11-25 20:19:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:11,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:11,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:11,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217850613] [2021-11-25 20:19:11,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217850613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:11,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:11,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:11,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098753715] [2021-11-25 20:19:11,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:11,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:11,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:11,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:11,982 INFO L87 Difference]: Start difference. First operand 5378 states and 7211 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) [2021-11-25 20:19:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:15,686 INFO L93 Difference]: Finished difference Result 9808 states and 13566 transitions. [2021-11-25 20:19:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:15,687 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 70 [2021-11-25 20:19:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:15,696 INFO L225 Difference]: With dead ends: 9808 [2021-11-25 20:19:15,696 INFO L226 Difference]: Without dead ends: 7358 [2021-11-25 20:19:15,699 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:19:15,700 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 554 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:15,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 1514 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2021-11-25 20:19:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 6900. [2021-11-25 20:19:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 6898 states have (on average 1.3531458393737315) internal successors, (9334), 6899 states have internal predecessors, (9334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 9334 transitions. [2021-11-25 20:19:18,924 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 9334 transitions. Word has length 70 [2021-11-25 20:19:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:18,924 INFO L470 AbstractCegarLoop]: Abstraction has 6900 states and 9334 transitions. [2021-11-25 20:19:18,924 INFO L471 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) [2021-11-25 20:19:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 9334 transitions. [2021-11-25 20:19:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:19:18,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:18,929 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:19:18,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:19:18,929 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:19:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1395696457, now seen corresponding path program 1 times [2021-11-25 20:19:18,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:18,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871869389] [2021-11-25 20:19:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:18,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:18,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871869389] [2021-11-25 20:19:18,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871869389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:18,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:18,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:18,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664872596] [2021-11-25 20:19:18,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:18,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:18,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:18,989 INFO L87 Difference]: Start difference. First operand 6900 states and 9334 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) [2021-11-25 20:19:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:24,284 INFO L93 Difference]: Finished difference Result 13710 states and 18941 transitions. [2021-11-25 20:19:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:24,285 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 [2021-11-25 20:19:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:24,295 INFO L225 Difference]: With dead ends: 13710 [2021-11-25 20:19:24,295 INFO L226 Difference]: Without dead ends: 9467 [2021-11-25 20:19:24,300 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:19:24,301 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 605 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:24,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 1447 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9467 states. [2021-11-25 20:19:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9467 to 9465. [2021-11-25 20:19:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9465 states, 9463 states have (on average 1.3588713938497305) internal successors, (12859), 9464 states have internal predecessors, (12859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9465 states to 9465 states and 12859 transitions. [2021-11-25 20:19:29,444 INFO L78 Accepts]: Start accepts. Automaton has 9465 states and 12859 transitions. Word has length 71 [2021-11-25 20:19:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:29,445 INFO L470 AbstractCegarLoop]: Abstraction has 9465 states and 12859 transitions. [2021-11-25 20:19:29,445 INFO L471 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) [2021-11-25 20:19:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9465 states and 12859 transitions. [2021-11-25 20:19:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:19:29,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:29,450 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:19:29,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:19:29,451 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:19:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1208387843, now seen corresponding path program 1 times [2021-11-25 20:19:29,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77578200] [2021-11-25 20:19:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:29,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:29,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:29,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77578200] [2021-11-25 20:19:29,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77578200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:29,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:29,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:19:29,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21419872] [2021-11-25 20:19:29,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:29,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:29,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:19:29,514 INFO L87 Difference]: Start difference. First operand 9465 states and 12859 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) [2021-11-25 20:19:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:37,800 INFO L93 Difference]: Finished difference Result 19426 states and 26543 transitions. [2021-11-25 20:19:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:37,801 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 [2021-11-25 20:19:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:37,819 INFO L225 Difference]: With dead ends: 19426 [2021-11-25 20:19:37,820 INFO L226 Difference]: Without dead ends: 13842 [2021-11-25 20:19:37,826 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:19:37,827 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 598 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:37,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 1825 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13842 states. [2021-11-25 20:19:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13842 to 13840. [2021-11-25 20:19:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13840 states, 13838 states have (on average 1.3437635496459026) internal successors, (18595), 13839 states have internal predecessors, (18595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:19:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 18595 transitions. [2021-11-25 20:19:45,792 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 18595 transitions. Word has length 71 [2021-11-25 20:19:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:45,792 INFO L470 AbstractCegarLoop]: Abstraction has 13840 states and 18595 transitions. [2021-11-25 20:19:45,793 INFO L471 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) [2021-11-25 20:19:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 18595 transitions. [2021-11-25 20:19:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:19:45,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:45,797 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:19:45,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 20:19:45,798 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:19:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash 38986714, now seen corresponding path program 1 times [2021-11-25 20:19:45,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:45,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050729380] [2021-11-25 20:19:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:45,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:45,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:45,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050729380] [2021-11-25 20:19:45,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050729380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:45,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:19:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628473233] [2021-11-25 20:19:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:45,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:19:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:19:45,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:45,933 INFO L87 Difference]: Start difference. First operand 13840 states and 18595 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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) [2021-11-25 20:19:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:56,403 INFO L93 Difference]: Finished difference Result 15600 states and 20789 transitions. [2021-11-25 20:19:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:19:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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 [2021-11-25 20:19:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:56,436 INFO L225 Difference]: With dead ends: 15600 [2021-11-25 20:19:56,436 INFO L226 Difference]: Without dead ends: 14699 [2021-11-25 20:19:56,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:19:56,442 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 3790 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3790 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:56,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3790 Valid, 2118 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:19:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14699 states. [2021-11-25 20:20:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14699 to 13839. [2021-11-25 20:20:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13837 states have (on average 1.3437161234371613) internal successors, (18593), 13838 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 18593 transitions. [2021-11-25 20:20:04,602 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 18593 transitions. Word has length 71 [2021-11-25 20:20:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 13839 states and 18593 transitions. [2021-11-25 20:20:04,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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) [2021-11-25 20:20:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 18593 transitions. [2021-11-25 20:20:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:20:04,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:04,608 INFO L514 BasicCegarLoop]: 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] [2021-11-25 20:20:04,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:20:04,608 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:20:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash -215376208, now seen corresponding path program 1 times [2021-11-25 20:20:04,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264654928] [2021-11-25 20:20:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:04,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:04,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:04,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264654928] [2021-11-25 20:20:04,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264654928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:04,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:04,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:20:04,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010377446] [2021-11-25 20:20:04,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:04,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:20:04,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:20:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:04,748 INFO L87 Difference]: Start difference. First operand 13839 states and 18593 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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) [2021-11-25 20:20:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:20,433 INFO L93 Difference]: Finished difference Result 22402 states and 29807 transitions. [2021-11-25 20:20:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:20:20,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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 [2021-11-25 20:20:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:20,464 INFO L225 Difference]: With dead ends: 22402 [2021-11-25 20:20:20,464 INFO L226 Difference]: Without dead ends: 21490 [2021-11-25 20:20:20,470 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:20:20,470 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 3127 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 2845 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3127 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:20,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3127 Valid, 2542 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2845 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:20:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21490 states. [2021-11-25 20:20:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21490 to 13839. [2021-11-25 20:20:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13837 states have (on average 1.3436438534364386) internal successors, (18592), 13838 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 18592 transitions. [2021-11-25 20:20:28,744 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 18592 transitions. Word has length 71 [2021-11-25 20:20:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:28,744 INFO L470 AbstractCegarLoop]: Abstraction has 13839 states and 18592 transitions. [2021-11-25 20:20:28,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 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) [2021-11-25 20:20:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 18592 transitions. [2021-11-25 20:20:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 20:20:28,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:28,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 20:20:28,750 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:20:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1479892977, now seen corresponding path program 1 times [2021-11-25 20:20:28,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:28,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652652285] [2021-11-25 20:20:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:28,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:29,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:29,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652652285] [2021-11-25 20:20:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652652285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:29,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:29,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:20:29,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873692775] [2021-11-25 20:20:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:29,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:20:29,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:20:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:20:29,165 INFO L87 Difference]: Start difference. First operand 13839 states and 18592 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:50,775 INFO L93 Difference]: Finished difference Result 29283 states and 39419 transitions. [2021-11-25 20:20:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 20:20:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-25 20:20:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:50,835 INFO L225 Difference]: With dead ends: 29283 [2021-11-25 20:20:50,836 INFO L226 Difference]: Without dead ends: 28811 [2021-11-25 20:20:50,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:20:50,844 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 6306 mSDsluCounter, 6610 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6306 SdHoareTripleChecker+Valid, 7528 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:50,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6306 Valid, 7528 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 20:20:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28811 states. [2021-11-25 20:20:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28811 to 13801. [2021-11-25 20:20:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13801 states, 13799 states have (on average 1.3440104355388072) internal successors, (18546), 13800 states have internal predecessors, (18546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13801 states to 13801 states and 18546 transitions. [2021-11-25 20:20:59,506 INFO L78 Accepts]: Start accepts. Automaton has 13801 states and 18546 transitions. Word has length 72 [2021-11-25 20:20:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:59,506 INFO L470 AbstractCegarLoop]: Abstraction has 13801 states and 18546 transitions. [2021-11-25 20:20:59,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 13801 states and 18546 transitions. [2021-11-25 20:20:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 20:20:59,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:59,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:59,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 20:20:59,512 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:20:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1228679381, now seen corresponding path program 1 times [2021-11-25 20:20:59,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:59,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716597103] [2021-11-25 20:20:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:59,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:59,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716597103] [2021-11-25 20:20:59,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716597103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:59,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:59,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:59,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419817454] [2021-11-25 20:20:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:59,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:59,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:59,580 INFO L87 Difference]: Start difference. First operand 13801 states and 18546 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:10,635 INFO L93 Difference]: Finished difference Result 21146 states and 28519 transitions. [2021-11-25 20:21:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-25 20:21:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:10,661 INFO L225 Difference]: With dead ends: 21146 [2021-11-25 20:21:10,661 INFO L226 Difference]: Without dead ends: 16325 [2021-11-25 20:21:10,668 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:21:10,668 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 562 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:10,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1400 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-11-25 20:21:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 13616. [2021-11-25 20:21:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13616 states, 13614 states have (on average 1.336785661818716) internal successors, (18199), 13615 states have internal predecessors, (18199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13616 states to 13616 states and 18199 transitions. [2021-11-25 20:21:19,472 INFO L78 Accepts]: Start accepts. Automaton has 13616 states and 18199 transitions. Word has length 72 [2021-11-25 20:21:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:19,473 INFO L470 AbstractCegarLoop]: Abstraction has 13616 states and 18199 transitions. [2021-11-25 20:21:19,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13616 states and 18199 transitions. [2021-11-25 20:21:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 20:21:19,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:19,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 20:21:19,477 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:21:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1214563715, now seen corresponding path program 1 times [2021-11-25 20:21:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:19,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217886019] [2021-11-25 20:21:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:19,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:19,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:19,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217886019] [2021-11-25 20:21:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217886019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:19,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:19,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:19,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384436392] [2021-11-25 20:21:19,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:19,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:19,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:19,539 INFO L87 Difference]: Start difference. First operand 13616 states and 18199 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:29,425 INFO L93 Difference]: Finished difference Result 26580 states and 35707 transitions. [2021-11-25 20:21:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-25 20:21:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:29,449 INFO L225 Difference]: With dead ends: 26580 [2021-11-25 20:21:29,449 INFO L226 Difference]: Without dead ends: 14398 [2021-11-25 20:21:29,464 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:21:29,465 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 879 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:29,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1234 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14398 states. [2021-11-25 20:21:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14398 to 12530. [2021-11-25 20:21:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12528 states have (on average 1.3393199233716475) internal successors, (16779), 12529 states have internal predecessors, (16779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 16779 transitions. [2021-11-25 20:21:37,999 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 16779 transitions. Word has length 72 [2021-11-25 20:21:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:38,000 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 16779 transitions. [2021-11-25 20:21:38,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 16779 transitions. [2021-11-25 20:21:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:21:38,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:38,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:38,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 20:21:38,002 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:21:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:38,003 INFO L85 PathProgramCache]: Analyzing trace with hash 805421842, now seen corresponding path program 1 times [2021-11-25 20:21:38,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:38,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210149735] [2021-11-25 20:21:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:38,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:38,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210149735] [2021-11-25 20:21:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210149735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:38,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:38,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:21:38,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227881469] [2021-11-25 20:21:38,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:38,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:38,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:38,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:38,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:38,204 INFO L87 Difference]: Start difference. First operand 12530 states and 16779 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:56,272 INFO L93 Difference]: Finished difference Result 22797 states and 30143 transitions. [2021-11-25 20:21:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:21:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2021-11-25 20:21:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:56,307 INFO L225 Difference]: With dead ends: 22797 [2021-11-25 20:21:56,307 INFO L226 Difference]: Without dead ends: 21906 [2021-11-25 20:21:56,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:21:56,314 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 4290 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4290 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:56,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4290 Valid, 2489 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 20:21:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21906 states. [2021-11-25 20:22:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21906 to 12530. [2021-11-25 20:22:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12528 states have (on average 1.3392401021711366) internal successors, (16778), 12529 states have internal predecessors, (16778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 16778 transitions. [2021-11-25 20:22:05,034 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 16778 transitions. Word has length 73 [2021-11-25 20:22:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:05,034 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 16778 transitions. [2021-11-25 20:22:05,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 16778 transitions. [2021-11-25 20:22:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:22:05,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:05,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:05,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 20:22:05,037 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:22:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1846027830, now seen corresponding path program 1 times [2021-11-25 20:22:05,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765158354] [2021-11-25 20:22:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:05,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:05,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765158354] [2021-11-25 20:22:05,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765158354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:05,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:05,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:22:05,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003868612] [2021-11-25 20:22:05,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:05,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:05,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:05,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:22:05,171 INFO L87 Difference]: Start difference. First operand 12530 states and 16778 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:17,387 INFO L93 Difference]: Finished difference Result 15894 states and 21022 transitions. [2021-11-25 20:22:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:22:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2021-11-25 20:22:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:17,409 INFO L225 Difference]: With dead ends: 15894 [2021-11-25 20:22:17,409 INFO L226 Difference]: Without dead ends: 15040 [2021-11-25 20:22:17,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:22:17,414 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 3518 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:17,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3518 Valid, 1977 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 20:22:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15040 states. [2021-11-25 20:22:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15040 to 12530. [2021-11-25 20:22:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12528 states have (on average 1.3391602809706258) internal successors, (16777), 12529 states have internal predecessors, (16777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 16777 transitions. [2021-11-25 20:22:26,008 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 16777 transitions. Word has length 73 [2021-11-25 20:22:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:26,009 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 16777 transitions. [2021-11-25 20:22:26,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 16777 transitions. [2021-11-25 20:22:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:22:26,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:26,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:26,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 20:22:26,012 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:22:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1717177262, now seen corresponding path program 1 times [2021-11-25 20:22:26,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:26,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347513849] [2021-11-25 20:22:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:26,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:26,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:26,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347513849] [2021-11-25 20:22:26,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347513849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:26,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:26,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:22:26,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500435838] [2021-11-25 20:22:26,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:26,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:26,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:22:26,154 INFO L87 Difference]: Start difference. First operand 12530 states and 16777 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:39,351 INFO L93 Difference]: Finished difference Result 16711 states and 22012 transitions. [2021-11-25 20:22:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:22:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2021-11-25 20:22:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:39,374 INFO L225 Difference]: With dead ends: 16711 [2021-11-25 20:22:39,374 INFO L226 Difference]: Without dead ends: 15847 [2021-11-25 20:22:39,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:22:39,379 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 3358 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3358 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:39,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3358 Valid, 2159 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:22:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15847 states. [2021-11-25 20:22:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15847 to 12530. [2021-11-25 20:22:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12528 states have (on average 1.339080459770115) internal successors, (16776), 12529 states have internal predecessors, (16776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 16776 transitions. [2021-11-25 20:22:48,118 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 16776 transitions. Word has length 73 [2021-11-25 20:22:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:48,118 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 16776 transitions. [2021-11-25 20:22:48,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:22:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 16776 transitions. [2021-11-25 20:22:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:22:48,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:48,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:48,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 20:22:48,123 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:22:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash 861010402, now seen corresponding path program 1 times [2021-11-25 20:22:48,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730062074] [2021-11-25 20:22:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:48,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:48,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:48,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730062074] [2021-11-25 20:22:48,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730062074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:48,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:48,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:22:48,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316754059] [2021-11-25 20:22:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:48,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:48,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:48,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:22:48,257 INFO L87 Difference]: Start difference. First operand 12530 states and 16776 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:00,578 INFO L93 Difference]: Finished difference Result 15894 states and 21020 transitions. [2021-11-25 20:23:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:23:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2021-11-25 20:23:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:00,601 INFO L225 Difference]: With dead ends: 15894 [2021-11-25 20:23:00,601 INFO L226 Difference]: Without dead ends: 15040 [2021-11-25 20:23:00,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:23:00,607 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 2332 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2332 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:00,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2332 Valid, 2013 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 20:23:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15040 states. [2021-11-25 20:23:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15040 to 12530. [2021-11-25 20:23:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12528 states have (on average 1.339000638569604) internal successors, (16775), 12529 states have internal predecessors, (16775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 16775 transitions. [2021-11-25 20:23:09,411 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 16775 transitions. Word has length 73 [2021-11-25 20:23:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:09,412 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 16775 transitions. [2021-11-25 20:23:09,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 16775 transitions. [2021-11-25 20:23:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:23:09,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:09,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:09,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-25 20:23:09,414 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:23:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:09,415 INFO L85 PathProgramCache]: Analyzing trace with hash 895912627, now seen corresponding path program 1 times [2021-11-25 20:23:09,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:09,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536128335] [2021-11-25 20:23:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:09,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:09,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:09,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536128335] [2021-11-25 20:23:09,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536128335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:09,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:09,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:23:09,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525050561] [2021-11-25 20:23:09,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:09,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:23:09,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:23:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:23:09,543 INFO L87 Difference]: Start difference. First operand 12530 states and 16775 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:20,666 INFO L93 Difference]: Finished difference Result 17163 states and 22584 transitions. [2021-11-25 20:23:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:23:20,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2021-11-25 20:23:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:20,686 INFO L225 Difference]: With dead ends: 17163 [2021-11-25 20:23:20,686 INFO L226 Difference]: Without dead ends: 16299 [2021-11-25 20:23:20,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:23:20,692 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 3347 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3347 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:20,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3347 Valid, 2146 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 20:23:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16299 states. [2021-11-25 20:23:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16299 to 12530. [2021-11-25 20:23:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12528 states have (on average 1.3389208173690932) internal successors, (16774), 12529 states have internal predecessors, (16774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 16774 transitions. [2021-11-25 20:23:27,799 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 16774 transitions. Word has length 73 [2021-11-25 20:23:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:27,800 INFO L470 AbstractCegarLoop]: Abstraction has 12530 states and 16774 transitions. [2021-11-25 20:23:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 16774 transitions. [2021-11-25 20:23:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:23:27,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:27,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:27,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-25 20:23:27,802 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:23:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1855348112, now seen corresponding path program 1 times [2021-11-25 20:23:27,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979605403] [2021-11-25 20:23:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:27,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:23:28,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979605403] [2021-11-25 20:23:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979605403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:28,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:23:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150143703] [2021-11-25 20:23:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:28,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:23:28,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:23:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:23:28,203 INFO L87 Difference]: Start difference. First operand 12530 states and 16774 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:51,951 INFO L93 Difference]: Finished difference Result 35551 states and 47242 transitions. [2021-11-25 20:23:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 20:23:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-25 20:23:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:51,999 INFO L225 Difference]: With dead ends: 35551 [2021-11-25 20:23:52,000 INFO L226 Difference]: Without dead ends: 34681 [2021-11-25 20:23:52,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 20:23:52,008 INFO L933 BasicCegarLoop]: 1291 mSDtfsCounter, 6723 mSDsluCounter, 8320 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6723 SdHoareTripleChecker+Valid, 9406 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:52,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6723 Valid, 9406 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:23:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34681 states. [2021-11-25 20:23:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34681 to 12512. [2021-11-25 20:23:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12512 states, 12511 states have (on average 1.3389816961074255) internal successors, (16752), 12511 states have internal predecessors, (16752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12512 states to 12512 states and 16752 transitions. [2021-11-25 20:23:59,556 INFO L78 Accepts]: Start accepts. Automaton has 12512 states and 16752 transitions. Word has length 74 [2021-11-25 20:23:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:59,556 INFO L470 AbstractCegarLoop]: Abstraction has 12512 states and 16752 transitions. [2021-11-25 20:23:59,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:23:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12512 states and 16752 transitions. [2021-11-25 20:23:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:23:59,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:59,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:59,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-25 20:23:59,559 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:23:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1612032279, now seen corresponding path program 1 times [2021-11-25 20:23:59,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:59,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869233282] [2021-11-25 20:23:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:59,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:24:00,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:24:00,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869233282] [2021-11-25 20:24:00,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869233282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:00,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:24:00,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:24:00,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071021312] [2021-11-25 20:24:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:00,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:24:00,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:24:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:24:00,013 INFO L87 Difference]: Start difference. First operand 12512 states and 16752 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:24:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:20,987 INFO L93 Difference]: Finished difference Result 30251 states and 40272 transitions. [2021-11-25 20:24:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 20:24:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-25 20:24:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:21,027 INFO L225 Difference]: With dead ends: 30251 [2021-11-25 20:24:21,027 INFO L226 Difference]: Without dead ends: 29390 [2021-11-25 20:24:21,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:24:21,034 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 5544 mSDsluCounter, 7231 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5544 SdHoareTripleChecker+Valid, 8129 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:21,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5544 Valid, 8129 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:24:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29390 states. [2021-11-25 20:24:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29390 to 12504. [2021-11-25 20:24:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12504 states, 12503 states have (on average 1.3389586499240183) internal successors, (16741), 12503 states have internal predecessors, (16741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:24:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12504 states to 12504 states and 16741 transitions. [2021-11-25 20:24:28,406 INFO L78 Accepts]: Start accepts. Automaton has 12504 states and 16741 transitions. Word has length 75 [2021-11-25 20:24:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:28,406 INFO L470 AbstractCegarLoop]: Abstraction has 12504 states and 16741 transitions. [2021-11-25 20:24:28,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:24:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 12504 states and 16741 transitions. [2021-11-25 20:24:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:24:28,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:28,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:28,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-25 20:24:28,409 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:24:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash 326937080, now seen corresponding path program 1 times [2021-11-25 20:24:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:24:28,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592409060] [2021-11-25 20:24:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:28,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:24:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:24:28,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:24:28,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592409060] [2021-11-25 20:24:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592409060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:28,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:24:28,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:24:28,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013706827] [2021-11-25 20:24:28,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:24:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:24:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:24:28,799 INFO L87 Difference]: Start difference. First operand 12504 states and 16741 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:24:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:46,719 INFO L93 Difference]: Finished difference Result 24990 states and 33094 transitions. [2021-11-25 20:24:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 20:24:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-25 20:24:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:46,749 INFO L225 Difference]: With dead ends: 24990 [2021-11-25 20:24:46,749 INFO L226 Difference]: Without dead ends: 24104 [2021-11-25 20:24:46,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=632, Unknown=0, NotChecked=0, Total=870 [2021-11-25 20:24:46,755 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 4244 mSDsluCounter, 5707 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4244 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:46,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4244 Valid, 6516 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:24:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24104 states. [2021-11-25 20:24:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24104 to 12470. [2021-11-25 20:24:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12470 states, 12469 states have (on average 1.3391611195765498) internal successors, (16698), 12469 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:24:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12470 states to 12470 states and 16698 transitions. [2021-11-25 20:24:54,451 INFO L78 Accepts]: Start accepts. Automaton has 12470 states and 16698 transitions. Word has length 75 [2021-11-25 20:24:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:54,451 INFO L470 AbstractCegarLoop]: Abstraction has 12470 states and 16698 transitions. [2021-11-25 20:24:54,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:24:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12470 states and 16698 transitions. [2021-11-25 20:24:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:24:54,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:54,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:54,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-25 20:24:54,454 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:24:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:54,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1626034959, now seen corresponding path program 1 times [2021-11-25 20:24:54,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:24:54,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350263684] [2021-11-25 20:24:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:54,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:24:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:24:54,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:24:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350263684] [2021-11-25 20:24:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350263684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:54,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:24:54,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:24:54,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740487450] [2021-11-25 20:24:54,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:54,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:24:54,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:24:54,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:24:54,500 INFO L87 Difference]: Start difference. First operand 12470 states and 16698 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:25:05,949 INFO L93 Difference]: Finished difference Result 29786 states and 40306 transitions. [2021-11-25 20:25:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:25:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-25 20:25:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:25:05,974 INFO L225 Difference]: With dead ends: 29786 [2021-11-25 20:25:05,974 INFO L226 Difference]: Without dead ends: 19004 [2021-11-25 20:25:05,985 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:25:05,985 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 301 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:25:05,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 1360 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:25:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19004 states. [2021-11-25 20:25:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19004 to 17487. [2021-11-25 20:25:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17487 states, 17486 states have (on average 1.332037058218003) internal successors, (23292), 17486 states have internal predecessors, (23292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17487 states to 17487 states and 23292 transitions. [2021-11-25 20:25:16,357 INFO L78 Accepts]: Start accepts. Automaton has 17487 states and 23292 transitions. Word has length 75 [2021-11-25 20:25:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:25:16,357 INFO L470 AbstractCegarLoop]: Abstraction has 17487 states and 23292 transitions. [2021-11-25 20:25:16,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17487 states and 23292 transitions. [2021-11-25 20:25:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:25:16,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:25:16,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:25:16,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-25 20:25:16,361 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:25:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:25:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash 22124065, now seen corresponding path program 1 times [2021-11-25 20:25:16,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:25:16,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970669254] [2021-11-25 20:25:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:25:16,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:25:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:25:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:25:16,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:25:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970669254] [2021-11-25 20:25:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970669254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:25:16,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:25:16,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:25:16,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293146692] [2021-11-25 20:25:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:25:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:25:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:25:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:25:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:25:16,705 INFO L87 Difference]: Start difference. First operand 17487 states and 23292 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:25:45,000 INFO L93 Difference]: Finished difference Result 39755 states and 52642 transitions. [2021-11-25 20:25:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:25:45,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-25 20:25:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:25:45,052 INFO L225 Difference]: With dead ends: 39755 [2021-11-25 20:25:45,052 INFO L226 Difference]: Without dead ends: 38534 [2021-11-25 20:25:45,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:25:45,060 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 5388 mSDsluCounter, 6024 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5388 SdHoareTripleChecker+Valid, 6727 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:25:45,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5388 Valid, 6727 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:25:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38534 states. [2021-11-25 20:25:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38534 to 17486. [2021-11-25 20:25:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17486 states, 17485 states have (on average 1.331998856162425) internal successors, (23290), 17485 states have internal predecessors, (23290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17486 states to 17486 states and 23290 transitions. [2021-11-25 20:25:56,084 INFO L78 Accepts]: Start accepts. Automaton has 17486 states and 23290 transitions. Word has length 76 [2021-11-25 20:25:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:25:56,085 INFO L470 AbstractCegarLoop]: Abstraction has 17486 states and 23290 transitions. [2021-11-25 20:25:56,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:25:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 17486 states and 23290 transitions. [2021-11-25 20:25:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:25:56,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:25:56,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:25:56,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-25 20:25:56,088 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:25:56,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:25:56,088 INFO L85 PathProgramCache]: Analyzing trace with hash 839549454, now seen corresponding path program 1 times [2021-11-25 20:25:56,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:25:56,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896775145] [2021-11-25 20:25:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:25:56,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:25:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:25:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:25:56,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:25:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896775145] [2021-11-25 20:25:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896775145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:25:56,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:25:56,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:25:56,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263404317] [2021-11-25 20:25:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:25:56,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:25:56,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:25:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:25:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:25:56,538 INFO L87 Difference]: Start difference. First operand 17486 states and 23290 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:26:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:34,633 INFO L93 Difference]: Finished difference Result 51070 states and 67357 transitions. [2021-11-25 20:26:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:26:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-25 20:26:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:34,707 INFO L225 Difference]: With dead ends: 51070 [2021-11-25 20:26:34,707 INFO L226 Difference]: Without dead ends: 49832 [2021-11-25 20:26:34,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:26:34,718 INFO L933 BasicCegarLoop]: 1182 mSDtfsCounter, 6394 mSDsluCounter, 8015 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6394 SdHoareTripleChecker+Valid, 8917 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:34,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6394 Valid, 8917 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 20:26:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49832 states. [2021-11-25 20:26:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49832 to 17466. [2021-11-25 20:26:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17466 states, 17465 states have (on average 1.3320354995705697) internal successors, (23264), 17465 states have internal predecessors, (23264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:26:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17466 states to 17466 states and 23264 transitions. [2021-11-25 20:26:46,373 INFO L78 Accepts]: Start accepts. Automaton has 17466 states and 23264 transitions. Word has length 76 [2021-11-25 20:26:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:46,374 INFO L470 AbstractCegarLoop]: Abstraction has 17466 states and 23264 transitions. [2021-11-25 20:26:46,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:26:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 17466 states and 23264 transitions. [2021-11-25 20:26:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:26:46,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:46,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:46,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-25 20:26:46,376 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:26:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:46,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1376924740, now seen corresponding path program 1 times [2021-11-25 20:26:46,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:46,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748843768] [2021-11-25 20:26:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:46,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:26:46,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748843768] [2021-11-25 20:26:46,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748843768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:26:46,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:26:46,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 20:26:46,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50157010] [2021-11-25 20:26:46,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:26:46,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:26:46,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:26:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:26:46,513 INFO L87 Difference]: Start difference. First operand 17466 states and 23264 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:20,504 INFO L93 Difference]: Finished difference Result 42716 states and 56205 transitions. [2021-11-25 20:27:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 20:27:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-25 20:27:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:20,574 INFO L225 Difference]: With dead ends: 42716 [2021-11-25 20:27:20,574 INFO L226 Difference]: Without dead ends: 42714 [2021-11-25 20:27:20,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:27:20,583 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 3960 mSDsluCounter, 3878 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3960 SdHoareTripleChecker+Valid, 4822 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:20,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3960 Valid, 4822 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:27:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42714 states. [2021-11-25 20:27:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42714 to 19597. [2021-11-25 20:27:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19597 states, 19596 states have (on average 1.3258828332312718) internal successors, (25982), 19596 states have internal predecessors, (25982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19597 states to 19597 states and 25982 transitions. [2021-11-25 20:27:35,831 INFO L78 Accepts]: Start accepts. Automaton has 19597 states and 25982 transitions. Word has length 78 [2021-11-25 20:27:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 19597 states and 25982 transitions. [2021-11-25 20:27:35,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 19597 states and 25982 transitions. [2021-11-25 20:27:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:27:35,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:35,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:35,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-25 20:27:35,835 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-25 20:27:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 134458976, now seen corresponding path program 1 times [2021-11-25 20:27:35,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262632896] [2021-11-25 20:27:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:35,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:27:35,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262632896] [2021-11-25 20:27:35,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262632896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:35,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:35,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:35,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172529283] [2021-11-25 20:27:35,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:35,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:35,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:35,896 INFO L87 Difference]: Start difference. First operand 19597 states and 25982 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)