./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8 --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 297d4f7e6fe1324d357f4812a6556f1cd58caa692e4601779e6f52e2ab17fbf7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:31,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:31,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:31,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:31,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:31,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:31,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:31,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:31,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:31,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:31,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:31,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:31,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:31,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:31,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:31,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:31,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:31,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:31,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:31,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:31,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:31,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:31,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:31,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:31,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:31,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:31,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:31,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:31,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:31,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:31,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:31,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:31,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:31,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:31,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:31,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:31,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:31,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:31,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:31,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:31,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:31,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:31,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:31,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:31,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:31,257 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:31,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:31,258 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:31,258 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:31,258 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:31,258 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:31,259 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:31,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:31,259 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:31,259 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:31,259 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:31,259 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:31,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:31,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:31,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:31,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:31,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:31,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:31,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:31,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:31,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:31,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:31,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:31,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:31,263 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:31,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:31,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:31,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:31,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:31,264 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_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 297d4f7e6fe1324d357f4812a6556f1cd58caa692e4601779e6f52e2ab17fbf7 [2021-11-07 01:03:31,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:31,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:31,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:31,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:31,640 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:31,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 01:03:31,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/data/e19ded761/9add41cc19d9481d84b42e62e162f4c9/FLAG9863a8f7d [2021-11-07 01:03:32,459 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:32,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 01:03:32,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/data/e19ded761/9add41cc19d9481d84b42e62e162f4c9/FLAG9863a8f7d [2021-11-07 01:03:32,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/data/e19ded761/9add41cc19d9481d84b42e62e162f4c9 [2021-11-07 01:03:32,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:32,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:32,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:32,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:32,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:32,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:32" (1/1) ... [2021-11-07 01:03:32,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a35526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:32, skipping insertion in model container [2021-11-07 01:03:32,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:32" (1/1) ... [2021-11-07 01:03:32,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:32,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:33,190 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16948,16961] [2021-11-07 01:03:33,247 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[23372,23385] [2021-11-07 01:03:33,263 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[26559,26572] [2021-11-07 01:03:33,279 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[29535,29548] [2021-11-07 01:03:33,321 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[33298,33311] [2021-11-07 01:03:33,335 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[36350,36363] [2021-11-07 01:03:33,364 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[39535,39548] [2021-11-07 01:03:33,377 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42506,42519] [2021-11-07 01:03:33,390 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[45890,45903] [2021-11-07 01:03:33,403 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[48876,48889] [2021-11-07 01:03:33,416 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[52025,52038] [2021-11-07 01:03:33,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:33,482 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:33,611 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16948,16961] [2021-11-07 01:03:33,656 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[23372,23385] [2021-11-07 01:03:33,678 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[26559,26572] [2021-11-07 01:03:33,698 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[29535,29548] [2021-11-07 01:03:33,723 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[33298,33311] [2021-11-07 01:03:33,744 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[36350,36363] [2021-11-07 01:03:33,764 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[39535,39548] [2021-11-07 01:03:33,783 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[42506,42519] [2021-11-07 01:03:33,805 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[45890,45903] [2021-11-07 01:03:33,824 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[48876,48889] [2021-11-07 01:03:33,845 WARN L228 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_f6e5b550-7645-488f-a923-e2a58f521428/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[52025,52038] [2021-11-07 01:03:33,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:33,907 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:33,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33 WrapperNode [2021-11-07 01:03:33,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:33,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:33,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:33,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:33,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:33,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:34,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:34,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:34,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:34,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:34,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:34,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:34,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:34,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (1/1) ... [2021-11-07 01:03:34,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:34,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:34,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:34,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:03:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:34,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:36,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:36,386 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:03:36,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:36 BoogieIcfgContainer [2021-11-07 01:03:36,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:36,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:36,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:36,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:36,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:32" (1/3) ... [2021-11-07 01:03:36,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb54691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:36, skipping insertion in model container [2021-11-07 01:03:36,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:33" (2/3) ... [2021-11-07 01:03:36,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb54691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:36, skipping insertion in model container [2021-11-07 01:03:36,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:36" (3/3) ... [2021-11-07 01:03:36,405 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 01:03:36,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:36,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 01:03:36,467 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:36,473 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 [2021-11-07 01:03:36,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 01:03:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 504 states have (on average 1.8353174603174602) internal successors, (925), 515 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:03:36,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:36,522 INFO L513 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] [2021-11-07 01:03:36,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1216794109, now seen corresponding path program 1 times [2021-11-07 01:03:36,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:36,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148232361] [2021-11-07 01:03:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:36,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:37,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:37,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148232361] [2021-11-07 01:03:37,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148232361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:37,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:37,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:37,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606222575] [2021-11-07 01:03:37,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:37,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:37,088 INFO L87 Difference]: Start difference. First operand has 516 states, 504 states have (on average 1.8353174603174602) internal successors, (925), 515 states have internal predecessors, (925), 0 states have call successors, (0), 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 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:37,866 INFO L93 Difference]: Finished difference Result 697 states and 1215 transitions. [2021-11-07 01:03:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:37,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 01:03:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:37,888 INFO L225 Difference]: With dead ends: 697 [2021-11-07 01:03:37,888 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 01:03:37,892 INFO L786 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 [2021-11-07 01:03:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 01:03:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2021-11-07 01:03:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 439 states have (on average 1.275626423690205) internal successors, (560), 449 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 560 transitions. [2021-11-07 01:03:38,014 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 560 transitions. Word has length 58 [2021-11-07 01:03:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:38,016 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 560 transitions. [2021-11-07 01:03:38,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 560 transitions. [2021-11-07 01:03:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:03:38,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:38,031 INFO L513 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] [2021-11-07 01:03:38,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:03:38,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:38,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1191017074, now seen corresponding path program 1 times [2021-11-07 01:03:38,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:38,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898932573] [2021-11-07 01:03:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:38,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:38,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:38,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898932573] [2021-11-07 01:03:38,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898932573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:38,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:38,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:38,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122381641] [2021-11-07 01:03:38,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:38,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:38,221 INFO L87 Difference]: Start difference. First operand 450 states and 560 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:38,522 INFO L93 Difference]: Finished difference Result 529 states and 648 transitions. [2021-11-07 01:03:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 01:03:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:38,534 INFO L225 Difference]: With dead ends: 529 [2021-11-07 01:03:38,535 INFO L226 Difference]: Without dead ends: 310 [2021-11-07 01:03:38,541 INFO L786 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 [2021-11-07 01:03:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-07 01:03:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-11-07 01:03:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 299 states have (on average 1.2675585284280937) internal successors, (379), 309 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 379 transitions. [2021-11-07 01:03:38,578 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 379 transitions. Word has length 58 [2021-11-07 01:03:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:38,587 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 379 transitions. [2021-11-07 01:03:38,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 379 transitions. [2021-11-07 01:03:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:03:38,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:38,590 INFO L513 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] [2021-11-07 01:03:38,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:03:38,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash 53020530, now seen corresponding path program 1 times [2021-11-07 01:03:38,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:38,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117922959] [2021-11-07 01:03:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:38,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:38,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:38,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117922959] [2021-11-07 01:03:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117922959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:38,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:38,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:38,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467402890] [2021-11-07 01:03:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:38,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:38,768 INFO L87 Difference]: Start difference. First operand 310 states and 379 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:39,087 INFO L93 Difference]: Finished difference Result 552 states and 681 transitions. [2021-11-07 01:03:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 01:03:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:39,091 INFO L225 Difference]: With dead ends: 552 [2021-11-07 01:03:39,091 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 01:03:39,091 INFO L786 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 [2021-11-07 01:03:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 01:03:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 346. [2021-11-07 01:03:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 335 states have (on average 1.319402985074627) internal successors, (442), 345 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 442 transitions. [2021-11-07 01:03:39,116 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 442 transitions. Word has length 58 [2021-11-07 01:03:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:39,118 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 442 transitions. [2021-11-07 01:03:39,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 442 transitions. [2021-11-07 01:03:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:03:39,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:39,120 INFO L513 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] [2021-11-07 01:03:39,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:03:39,120 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash 84136005, now seen corresponding path program 1 times [2021-11-07 01:03:39,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:39,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097746812] [2021-11-07 01:03:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:39,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:39,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:39,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097746812] [2021-11-07 01:03:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097746812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:39,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231300760] [2021-11-07 01:03:39,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:39,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:39,235 INFO L87 Difference]: Start difference. First operand 346 states and 442 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:39,405 INFO L93 Difference]: Finished difference Result 490 states and 622 transitions. [2021-11-07 01:03:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:03:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:39,407 INFO L225 Difference]: With dead ends: 490 [2021-11-07 01:03:39,408 INFO L226 Difference]: Without dead ends: 298 [2021-11-07 01:03:39,408 INFO L786 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 [2021-11-07 01:03:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-07 01:03:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-11-07 01:03:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.3205574912891986) internal successors, (379), 297 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 379 transitions. [2021-11-07 01:03:39,429 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 379 transitions. Word has length 59 [2021-11-07 01:03:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:39,429 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 379 transitions. [2021-11-07 01:03:39,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 379 transitions. [2021-11-07 01:03:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:03:39,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:39,432 INFO L513 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] [2021-11-07 01:03:39,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:03:39,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1322654244, now seen corresponding path program 1 times [2021-11-07 01:03:39,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:39,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305094162] [2021-11-07 01:03:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:39,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:39,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305094162] [2021-11-07 01:03:39,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305094162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:39,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:39,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:39,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197185963] [2021-11-07 01:03:39,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:39,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:39,665 INFO L87 Difference]: Start difference. First operand 298 states and 379 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:40,417 INFO L93 Difference]: Finished difference Result 691 states and 895 transitions. [2021-11-07 01:03:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:03:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:03:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:40,422 INFO L225 Difference]: With dead ends: 691 [2021-11-07 01:03:40,423 INFO L226 Difference]: Without dead ends: 611 [2021-11-07 01:03:40,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:03:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-07 01:03:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 298. [2021-11-07 01:03:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.3170731707317074) internal successors, (378), 297 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 378 transitions. [2021-11-07 01:03:40,463 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 378 transitions. Word has length 60 [2021-11-07 01:03:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:40,465 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 378 transitions. [2021-11-07 01:03:40,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 378 transitions. [2021-11-07 01:03:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:03:40,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:40,469 INFO L513 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] [2021-11-07 01:03:40,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:03:40,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:40,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1579426260, now seen corresponding path program 1 times [2021-11-07 01:03:40,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:40,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250143658] [2021-11-07 01:03:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:40,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:40,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250143658] [2021-11-07 01:03:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250143658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:40,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:40,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132700197] [2021-11-07 01:03:40,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:40,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:40,668 INFO L87 Difference]: Start difference. First operand 298 states and 378 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:41,509 INFO L93 Difference]: Finished difference Result 591 states and 753 transitions. [2021-11-07 01:03:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:03:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:03:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:41,512 INFO L225 Difference]: With dead ends: 591 [2021-11-07 01:03:41,513 INFO L226 Difference]: Without dead ends: 489 [2021-11-07 01:03:41,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:03:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-07 01:03:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-11-07 01:03:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.3135888501742161) internal successors, (377), 297 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 377 transitions. [2021-11-07 01:03:41,550 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 377 transitions. Word has length 60 [2021-11-07 01:03:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:41,551 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 377 transitions. [2021-11-07 01:03:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 377 transitions. [2021-11-07 01:03:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:03:41,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:41,553 INFO L513 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] [2021-11-07 01:03:41,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:03:41,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1013492058, now seen corresponding path program 1 times [2021-11-07 01:03:41,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:41,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135607013] [2021-11-07 01:03:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:41,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:41,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:41,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135607013] [2021-11-07 01:03:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135607013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:41,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:41,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:03:41,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081683147] [2021-11-07 01:03:41,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:03:41,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:03:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:41,734 INFO L87 Difference]: Start difference. First operand 298 states and 377 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:42,234 INFO L93 Difference]: Finished difference Result 572 states and 710 transitions. [2021-11-07 01:03:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:03:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:03:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:42,239 INFO L225 Difference]: With dead ends: 572 [2021-11-07 01:03:42,239 INFO L226 Difference]: Without dead ends: 425 [2021-11-07 01:03:42,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:03:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-07 01:03:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 298. [2021-11-07 01:03:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.3101045296167246) internal successors, (376), 297 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 376 transitions. [2021-11-07 01:03:42,271 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 376 transitions. Word has length 60 [2021-11-07 01:03:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:42,271 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 376 transitions. [2021-11-07 01:03:42,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 376 transitions. [2021-11-07 01:03:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:42,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:42,273 INFO L513 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] [2021-11-07 01:03:42,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:03:42,273 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1005199851, now seen corresponding path program 1 times [2021-11-07 01:03:42,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:42,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563164631] [2021-11-07 01:03:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:42,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:42,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:42,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563164631] [2021-11-07 01:03:42,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563164631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:42,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:42,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:42,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194713061] [2021-11-07 01:03:42,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:42,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:42,398 INFO L87 Difference]: Start difference. First operand 298 states and 376 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:43,305 INFO L93 Difference]: Finished difference Result 628 states and 804 transitions. [2021-11-07 01:03:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:03:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:43,309 INFO L225 Difference]: With dead ends: 628 [2021-11-07 01:03:43,310 INFO L226 Difference]: Without dead ends: 611 [2021-11-07 01:03:43,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:03:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-07 01:03:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 298. [2021-11-07 01:03:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.3031358885017421) internal successors, (374), 297 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 374 transitions. [2021-11-07 01:03:43,368 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 374 transitions. Word has length 62 [2021-11-07 01:03:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:43,368 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 374 transitions. [2021-11-07 01:03:43,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 374 transitions. [2021-11-07 01:03:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:43,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:43,370 INFO L513 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] [2021-11-07 01:03:43,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:03:43,371 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1319054290, now seen corresponding path program 1 times [2021-11-07 01:03:43,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:43,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863727543] [2021-11-07 01:03:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:43,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:43,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:43,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863727543] [2021-11-07 01:03:43,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863727543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:43,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:43,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:43,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010721652] [2021-11-07 01:03:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:43,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:43,524 INFO L87 Difference]: Start difference. First operand 298 states and 374 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:44,328 INFO L93 Difference]: Finished difference Result 596 states and 753 transitions. [2021-11-07 01:03:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:03:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:44,333 INFO L225 Difference]: With dead ends: 596 [2021-11-07 01:03:44,334 INFO L226 Difference]: Without dead ends: 591 [2021-11-07 01:03:44,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:03:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-07 01:03:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 298. [2021-11-07 01:03:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.2961672473867596) internal successors, (372), 297 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 372 transitions. [2021-11-07 01:03:44,375 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 372 transitions. Word has length 62 [2021-11-07 01:03:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:44,376 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 372 transitions. [2021-11-07 01:03:44,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 372 transitions. [2021-11-07 01:03:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:44,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:44,378 INFO L513 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] [2021-11-07 01:03:44,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:03:44,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash -806955644, now seen corresponding path program 1 times [2021-11-07 01:03:44,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:44,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031899616] [2021-11-07 01:03:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:44,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:44,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:44,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031899616] [2021-11-07 01:03:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031899616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:44,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:44,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 01:03:44,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349802275] [2021-11-07 01:03:44,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:03:44,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:03:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:03:44,628 INFO L87 Difference]: Start difference. First operand 298 states and 372 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:45,673 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2021-11-07 01:03:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:03:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:45,677 INFO L225 Difference]: With dead ends: 544 [2021-11-07 01:03:45,677 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:03:45,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:03:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:03:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 298. [2021-11-07 01:03:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.289198606271777) internal successors, (370), 297 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 370 transitions. [2021-11-07 01:03:45,713 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 370 transitions. Word has length 62 [2021-11-07 01:03:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:45,713 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 370 transitions. [2021-11-07 01:03:45,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 370 transitions. [2021-11-07 01:03:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:45,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:45,715 INFO L513 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] [2021-11-07 01:03:45,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:03:45,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2033918897, now seen corresponding path program 1 times [2021-11-07 01:03:45,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:45,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44988950] [2021-11-07 01:03:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:45,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:45,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:45,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44988950] [2021-11-07 01:03:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44988950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:45,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:45,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:45,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528984748] [2021-11-07 01:03:45,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:45,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:45,836 INFO L87 Difference]: Start difference. First operand 298 states and 370 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:46,613 INFO L93 Difference]: Finished difference Result 696 states and 891 transitions. [2021-11-07 01:03:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:03:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:46,618 INFO L225 Difference]: With dead ends: 696 [2021-11-07 01:03:46,618 INFO L226 Difference]: Without dead ends: 611 [2021-11-07 01:03:46,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:03:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-07 01:03:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 298. [2021-11-07 01:03:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.2857142857142858) internal successors, (369), 297 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 369 transitions. [2021-11-07 01:03:46,657 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 369 transitions. Word has length 62 [2021-11-07 01:03:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:46,657 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 369 transitions. [2021-11-07 01:03:46,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 369 transitions. [2021-11-07 01:03:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:46,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:46,659 INFO L513 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] [2021-11-07 01:03:46,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:03:46,659 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1443459928, now seen corresponding path program 1 times [2021-11-07 01:03:46,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:46,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014356202] [2021-11-07 01:03:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:46,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:46,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:46,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014356202] [2021-11-07 01:03:46,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014356202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:46,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:46,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:46,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271670952] [2021-11-07 01:03:46,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:46,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:46,768 INFO L87 Difference]: Start difference. First operand 298 states and 369 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:47,462 INFO L93 Difference]: Finished difference Result 664 states and 841 transitions. [2021-11-07 01:03:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:03:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:47,466 INFO L225 Difference]: With dead ends: 664 [2021-11-07 01:03:47,466 INFO L226 Difference]: Without dead ends: 591 [2021-11-07 01:03:47,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:03:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-07 01:03:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 298. [2021-11-07 01:03:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.2822299651567943) internal successors, (368), 297 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 368 transitions. [2021-11-07 01:03:47,504 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 368 transitions. Word has length 62 [2021-11-07 01:03:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:47,505 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 368 transitions. [2021-11-07 01:03:47,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 368 transitions. [2021-11-07 01:03:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:47,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:47,506 INFO L513 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] [2021-11-07 01:03:47,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:03:47,507 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 823720425, now seen corresponding path program 1 times [2021-11-07 01:03:47,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:47,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089462043] [2021-11-07 01:03:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:47,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:47,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089462043] [2021-11-07 01:03:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089462043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:47,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:47,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:47,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201195799] [2021-11-07 01:03:47,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:47,610 INFO L87 Difference]: Start difference. First operand 298 states and 368 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:48,348 INFO L93 Difference]: Finished difference Result 596 states and 747 transitions. [2021-11-07 01:03:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:03:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:48,353 INFO L225 Difference]: With dead ends: 596 [2021-11-07 01:03:48,353 INFO L226 Difference]: Without dead ends: 591 [2021-11-07 01:03:48,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:03:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-07 01:03:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 298. [2021-11-07 01:03:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.278745644599303) internal successors, (367), 297 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 367 transitions. [2021-11-07 01:03:48,417 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 367 transitions. Word has length 62 [2021-11-07 01:03:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 367 transitions. [2021-11-07 01:03:48,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 367 transitions. [2021-11-07 01:03:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:48,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:48,419 INFO L513 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] [2021-11-07 01:03:48,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:03:48,419 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2020699465, now seen corresponding path program 1 times [2021-11-07 01:03:48,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:48,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155555255] [2021-11-07 01:03:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:48,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:48,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:48,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155555255] [2021-11-07 01:03:48,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155555255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:48,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:48,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:48,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790092428] [2021-11-07 01:03:48,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:48,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:48,534 INFO L87 Difference]: Start difference. First operand 298 states and 367 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:49,201 INFO L93 Difference]: Finished difference Result 661 states and 835 transitions. [2021-11-07 01:03:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:03:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:03:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:49,206 INFO L225 Difference]: With dead ends: 661 [2021-11-07 01:03:49,206 INFO L226 Difference]: Without dead ends: 591 [2021-11-07 01:03:49,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:03:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-07 01:03:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 298. [2021-11-07 01:03:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 287 states have (on average 1.2752613240418118) internal successors, (366), 297 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 366 transitions. [2021-11-07 01:03:49,249 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 366 transitions. Word has length 62 [2021-11-07 01:03:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:49,249 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 366 transitions. [2021-11-07 01:03:49,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 366 transitions. [2021-11-07 01:03:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:03:49,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:49,251 INFO L513 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] [2021-11-07 01:03:49,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:03:49,251 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash -29192250, now seen corresponding path program 1 times [2021-11-07 01:03:49,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:49,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692990983] [2021-11-07 01:03:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:49,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:49,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:49,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692990983] [2021-11-07 01:03:49,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692990983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:49,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:49,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:03:49,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403701047] [2021-11-07 01:03:49,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:03:49,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:49,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:03:49,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:03:49,633 INFO L87 Difference]: Start difference. First operand 298 states and 366 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 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) [2021-11-07 01:03:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:50,267 INFO L93 Difference]: Finished difference Result 570 states and 726 transitions. [2021-11-07 01:03:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:03:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 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 [2021-11-07 01:03:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:50,270 INFO L225 Difference]: With dead ends: 570 [2021-11-07 01:03:50,270 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 01:03:50,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:03:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 01:03:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 256. [2021-11-07 01:03:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 248 states have (on average 1.2661290322580645) internal successors, (314), 255 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 314 transitions. [2021-11-07 01:03:50,317 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 314 transitions. Word has length 64 [2021-11-07 01:03:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:50,317 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 314 transitions. [2021-11-07 01:03:50,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 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) [2021-11-07 01:03:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 314 transitions. [2021-11-07 01:03:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:03:50,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:50,319 INFO L513 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] [2021-11-07 01:03:50,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:03:50,320 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1085248927, now seen corresponding path program 1 times [2021-11-07 01:03:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:50,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289659217] [2021-11-07 01:03:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:50,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:51,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:51,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289659217] [2021-11-07 01:03:51,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289659217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:51,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:51,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-07 01:03:51,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149958226] [2021-11-07 01:03:51,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 01:03:51,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 01:03:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:03:51,331 INFO L87 Difference]: Start difference. First operand 256 states and 314 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-11-07 01:03:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:54,075 INFO L93 Difference]: Finished difference Result 651 states and 799 transitions. [2021-11-07 01:03:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:03:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 [2021-11-07 01:03:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:54,079 INFO L225 Difference]: With dead ends: 651 [2021-11-07 01:03:54,080 INFO L226 Difference]: Without dead ends: 579 [2021-11-07 01:03:54,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:03:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-07 01:03:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 266. [2021-11-07 01:03:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.2751937984496124) internal successors, (329), 265 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 329 transitions. [2021-11-07 01:03:54,128 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 329 transitions. Word has length 64 [2021-11-07 01:03:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:54,129 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 329 transitions. [2021-11-07 01:03:54,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-11-07 01:03:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 329 transitions. [2021-11-07 01:03:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:03:54,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:54,130 INFO L513 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] [2021-11-07 01:03:54,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:03:54,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash 632833740, now seen corresponding path program 1 times [2021-11-07 01:03:54,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:54,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615234294] [2021-11-07 01:03:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:54,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:54,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:54,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615234294] [2021-11-07 01:03:54,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615234294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:54,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:54,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 01:03:54,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132135580] [2021-11-07 01:03:54,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:03:54,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:03:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:03:54,451 INFO L87 Difference]: Start difference. First operand 266 states and 329 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 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) [2021-11-07 01:03:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:55,461 INFO L93 Difference]: Finished difference Result 684 states and 844 transitions. [2021-11-07 01:03:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:03:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 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 [2021-11-07 01:03:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:55,464 INFO L225 Difference]: With dead ends: 684 [2021-11-07 01:03:55,464 INFO L226 Difference]: Without dead ends: 612 [2021-11-07 01:03:55,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:03:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-07 01:03:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 262. [2021-11-07 01:03:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 255 states have (on average 1.2705882352941176) internal successors, (324), 261 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 324 transitions. [2021-11-07 01:03:55,524 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 324 transitions. Word has length 64 [2021-11-07 01:03:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:55,524 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 324 transitions. [2021-11-07 01:03:55,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 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) [2021-11-07 01:03:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 324 transitions. [2021-11-07 01:03:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:03:55,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:55,526 INFO L513 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] [2021-11-07 01:03:55,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:03:55,527 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1854610684, now seen corresponding path program 1 times [2021-11-07 01:03:55,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:55,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267199782] [2021-11-07 01:03:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:55,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:55,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:55,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267199782] [2021-11-07 01:03:55,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267199782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:55,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 01:03:55,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532105172] [2021-11-07 01:03:55,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:03:55,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:03:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:03:55,789 INFO L87 Difference]: Start difference. First operand 262 states and 324 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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) [2021-11-07 01:03:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:56,286 INFO L93 Difference]: Finished difference Result 514 states and 643 transitions. [2021-11-07 01:03:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:03:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 [2021-11-07 01:03:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:56,292 INFO L225 Difference]: With dead ends: 514 [2021-11-07 01:03:56,292 INFO L226 Difference]: Without dead ends: 387 [2021-11-07 01:03:56,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:03:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-07 01:03:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 203. [2021-11-07 01:03:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 199 states have (on average 1.2663316582914572) internal successors, (252), 202 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 252 transitions. [2021-11-07 01:03:56,345 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 252 transitions. Word has length 64 [2021-11-07 01:03:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:56,345 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 252 transitions. [2021-11-07 01:03:56,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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) [2021-11-07 01:03:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 252 transitions. [2021-11-07 01:03:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:03:56,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:56,346 INFO L513 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] [2021-11-07 01:03:56,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:03:56,347 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash -776132116, now seen corresponding path program 1 times [2021-11-07 01:03:56,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:56,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303549792] [2021-11-07 01:03:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:56,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:56,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:56,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303549792] [2021-11-07 01:03:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303549792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:56,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:56,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-07 01:03:56,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002051091] [2021-11-07 01:03:56,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:03:56,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:03:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:03:56,715 INFO L87 Difference]: Start difference. First operand 203 states and 252 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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) [2021-11-07 01:03:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:57,764 INFO L93 Difference]: Finished difference Result 577 states and 740 transitions. [2021-11-07 01:03:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:03:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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 [2021-11-07 01:03:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:57,768 INFO L225 Difference]: With dead ends: 577 [2021-11-07 01:03:57,768 INFO L226 Difference]: Without dead ends: 483 [2021-11-07 01:03:57,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:03:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-07 01:03:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 171. [2021-11-07 01:03:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 170 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 207 transitions. [2021-11-07 01:03:57,823 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 207 transitions. Word has length 65 [2021-11-07 01:03:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:57,823 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 207 transitions. [2021-11-07 01:03:57,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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) [2021-11-07 01:03:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 207 transitions. [2021-11-07 01:03:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:03:57,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:57,825 INFO L513 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] [2021-11-07 01:03:57,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:03:57,825 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2125205281, now seen corresponding path program 1 times [2021-11-07 01:03:57,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:57,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894558008] [2021-11-07 01:03:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:57,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:57,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:57,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894558008] [2021-11-07 01:03:57,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894558008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:57,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:57,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:03:57,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52928930] [2021-11-07 01:03:57,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:03:57,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:03:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:57,914 INFO L87 Difference]: Start difference. First operand 171 states and 207 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) [2021-11-07 01:03:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:58,257 INFO L93 Difference]: Finished difference Result 385 states and 483 transitions. [2021-11-07 01:03:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:03:58,260 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 [2021-11-07 01:03:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:58,261 INFO L225 Difference]: With dead ends: 385 [2021-11-07 01:03:58,262 INFO L226 Difference]: Without dead ends: 287 [2021-11-07 01:03:58,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:03:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-07 01:03:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 171. [2021-11-07 01:03:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 169 states have (on average 1.21301775147929) internal successors, (205), 170 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2021-11-07 01:03:58,327 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 65 [2021-11-07 01:03:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:58,327 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2021-11-07 01:03:58,327 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) [2021-11-07 01:03:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2021-11-07 01:03:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:03:58,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:58,328 INFO L513 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] [2021-11-07 01:03:58,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:03:58,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:03:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 846749532, now seen corresponding path program 1 times [2021-11-07 01:03:58,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:58,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520397834] [2021-11-07 01:03:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:58,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:58,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:58,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520397834] [2021-11-07 01:03:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520397834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:58,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:58,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-07 01:03:58,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826542876] [2021-11-07 01:03:58,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 01:03:58,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 01:03:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:03:59,000 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) [2021-11-07 01:04:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:00,616 INFO L93 Difference]: Finished difference Result 566 states and 723 transitions. [2021-11-07 01:04:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:04:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 [2021-11-07 01:04:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:00,619 INFO L225 Difference]: With dead ends: 566 [2021-11-07 01:04:00,619 INFO L226 Difference]: Without dead ends: 560 [2021-11-07 01:04:00,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:04:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-07 01:04:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 182. [2021-11-07 01:04:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.2166666666666666) internal successors, (219), 181 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2021-11-07 01:04:00,666 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 67 [2021-11-07 01:04:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:00,666 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2021-11-07 01:04:00,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) [2021-11-07 01:04:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2021-11-07 01:04:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:04:00,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:00,668 INFO L513 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] [2021-11-07 01:04:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:04:00,668 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 766856175, now seen corresponding path program 1 times [2021-11-07 01:04:00,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:00,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082914426] [2021-11-07 01:04:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:00,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:01,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:01,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082914426] [2021-11-07 01:04:01,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082914426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:01,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:01,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-07 01:04:01,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872139062] [2021-11-07 01:04:01,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 01:04:01,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 01:04:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:04:01,975 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-11-07 01:04:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:04,951 INFO L93 Difference]: Finished difference Result 583 states and 745 transitions. [2021-11-07 01:04:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:04:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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 [2021-11-07 01:04:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:04,958 INFO L225 Difference]: With dead ends: 583 [2021-11-07 01:04:04,958 INFO L226 Difference]: Without dead ends: 577 [2021-11-07 01:04:04,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:04:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-07 01:04:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 177. [2021-11-07 01:04:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.217142857142857) internal successors, (213), 176 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2021-11-07 01:04:05,026 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 68 [2021-11-07 01:04:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:05,026 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2021-11-07 01:04:05,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-11-07 01:04:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2021-11-07 01:04:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:04:05,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:05,028 INFO L513 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] [2021-11-07 01:04:05,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:04:05,028 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1753755548, now seen corresponding path program 1 times [2021-11-07 01:04:05,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:05,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838388538] [2021-11-07 01:04:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:05,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:05,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:05,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838388538] [2021-11-07 01:04:05,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838388538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:05,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:05,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-07 01:04:05,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176600388] [2021-11-07 01:04:05,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:04:05,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:04:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:04:05,993 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-11-07 01:04:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:08,512 INFO L93 Difference]: Finished difference Result 574 states and 735 transitions. [2021-11-07 01:04:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:04:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 [2021-11-07 01:04:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:08,515 INFO L225 Difference]: With dead ends: 574 [2021-11-07 01:04:08,516 INFO L226 Difference]: Without dead ends: 568 [2021-11-07 01:04:08,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:04:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-07 01:04:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 183. [2021-11-07 01:04:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-11-07 01:04:08,567 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 68 [2021-11-07 01:04:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:08,568 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-11-07 01:04:08,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-11-07 01:04:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-11-07 01:04:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:04:08,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:08,569 INFO L513 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] [2021-11-07 01:04:08,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:04:08,570 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 244034637, now seen corresponding path program 1 times [2021-11-07 01:04:08,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:08,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066023856] [2021-11-07 01:04:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:08,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:08,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:08,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066023856] [2021-11-07 01:04:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066023856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:08,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:04:08,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557015227] [2021-11-07 01:04:08,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:04:08,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:04:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:04:08,868 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 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) [2021-11-07 01:04:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:09,722 INFO L93 Difference]: Finished difference Result 441 states and 555 transitions. [2021-11-07 01:04:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:04:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 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 [2021-11-07 01:04:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:09,724 INFO L225 Difference]: With dead ends: 441 [2021-11-07 01:04:09,724 INFO L226 Difference]: Without dead ends: 435 [2021-11-07 01:04:09,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:04:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-07 01:04:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 165. [2021-11-07 01:04:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 164 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2021-11-07 01:04:09,777 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 68 [2021-11-07 01:04:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:09,777 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2021-11-07 01:04:09,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 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) [2021-11-07 01:04:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2021-11-07 01:04:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:04:09,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:09,778 INFO L513 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, 1] [2021-11-07 01:04:09,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:04:09,779 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash 41010503, now seen corresponding path program 1 times [2021-11-07 01:04:09,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:09,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974857646] [2021-11-07 01:04:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:09,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:09,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:09,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974857646] [2021-11-07 01:04:09,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974857646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:09,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:09,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:09,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432148189] [2021-11-07 01:04:09,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:09,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:09,836 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:09,957 INFO L93 Difference]: Finished difference Result 241 states and 300 transitions. [2021-11-07 01:04:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 01:04:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:09,959 INFO L225 Difference]: With dead ends: 241 [2021-11-07 01:04:09,959 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 01:04:09,960 INFO L786 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 [2021-11-07 01:04:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 01:04:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2021-11-07 01:04:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2256410256410257) internal successors, (239), 195 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2021-11-07 01:04:10,057 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 81 [2021-11-07 01:04:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:10,058 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2021-11-07 01:04:10,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2021-11-07 01:04:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:04:10,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:10,060 INFO L513 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, 1, 1, 1, 1] [2021-11-07 01:04:10,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:04:10,060 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1034208636, now seen corresponding path program 1 times [2021-11-07 01:04:10,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:10,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59315622] [2021-11-07 01:04:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:10,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:10,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:10,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59315622] [2021-11-07 01:04:10,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59315622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:10,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:10,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:10,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393605852] [2021-11-07 01:04:10,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:10,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:10,115 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:10,300 INFO L93 Difference]: Finished difference Result 390 states and 501 transitions. [2021-11-07 01:04:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-07 01:04:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:10,303 INFO L225 Difference]: With dead ends: 390 [2021-11-07 01:04:10,303 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 01:04:10,303 INFO L786 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 [2021-11-07 01:04:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 01:04:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 279. [2021-11-07 01:04:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.2625899280575539) internal successors, (351), 278 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 351 transitions. [2021-11-07 01:04:10,458 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 351 transitions. Word has length 84 [2021-11-07 01:04:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:10,459 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 351 transitions. [2021-11-07 01:04:10,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 351 transitions. [2021-11-07 01:04:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:04:10,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:10,460 INFO L513 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:10,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:04:10,461 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash 11056114, now seen corresponding path program 1 times [2021-11-07 01:04:10,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:10,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80733753] [2021-11-07 01:04:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:10,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:10,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:10,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80733753] [2021-11-07 01:04:10,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80733753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:10,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:10,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:10,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82300152] [2021-11-07 01:04:10,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:10,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:10,541 INFO L87 Difference]: Start difference. First operand 279 states and 351 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:10,839 INFO L93 Difference]: Finished difference Result 639 states and 837 transitions. [2021-11-07 01:04:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-07 01:04:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:10,842 INFO L225 Difference]: With dead ends: 639 [2021-11-07 01:04:10,842 INFO L226 Difference]: Without dead ends: 459 [2021-11-07 01:04:10,843 INFO L786 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 [2021-11-07 01:04:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-07 01:04:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 433. [2021-11-07 01:04:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.2893518518518519) internal successors, (557), 432 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 557 transitions. [2021-11-07 01:04:11,134 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 557 transitions. Word has length 87 [2021-11-07 01:04:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:11,134 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 557 transitions. [2021-11-07 01:04:11,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 557 transitions. [2021-11-07 01:04:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:04:11,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:11,136 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:11,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:04:11,136 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 378871211, now seen corresponding path program 1 times [2021-11-07 01:04:11,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:11,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061139808] [2021-11-07 01:04:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:11,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:11,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:11,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061139808] [2021-11-07 01:04:11,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061139808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:11,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:11,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:11,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776080220] [2021-11-07 01:04:11,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:11,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:11,192 INFO L87 Difference]: Start difference. First operand 433 states and 557 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:11,731 INFO L93 Difference]: Finished difference Result 1101 states and 1455 transitions. [2021-11-07 01:04:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:11,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:04:11,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:11,737 INFO L225 Difference]: With dead ends: 1101 [2021-11-07 01:04:11,737 INFO L226 Difference]: Without dead ends: 767 [2021-11-07 01:04:11,738 INFO L786 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 [2021-11-07 01:04:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-11-07 01:04:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 717. [2021-11-07 01:04:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.303072625698324) internal successors, (933), 716 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 933 transitions. [2021-11-07 01:04:12,207 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 933 transitions. Word has length 90 [2021-11-07 01:04:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:12,207 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 933 transitions. [2021-11-07 01:04:12,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 933 transitions. [2021-11-07 01:04:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:04:12,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:12,209 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:12,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 01:04:12,209 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash 823532023, now seen corresponding path program 1 times [2021-11-07 01:04:12,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:12,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337360038] [2021-11-07 01:04:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:12,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:12,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:12,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337360038] [2021-11-07 01:04:12,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337360038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:12,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:12,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:04:12,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276562013] [2021-11-07 01:04:12,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:12,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:12,277 INFO L87 Difference]: Start difference. First operand 717 states and 933 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:13,830 INFO L93 Difference]: Finished difference Result 2718 states and 3598 transitions. [2021-11-07 01:04:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:04:13,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:04:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:13,840 INFO L225 Difference]: With dead ends: 2718 [2021-11-07 01:04:13,841 INFO L226 Difference]: Without dead ends: 2100 [2021-11-07 01:04:13,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-11-07 01:04:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1047. [2021-11-07 01:04:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 1.2992351816443595) internal successors, (1359), 1046 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1359 transitions. [2021-11-07 01:04:14,441 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1359 transitions. Word has length 93 [2021-11-07 01:04:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:14,441 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1359 transitions. [2021-11-07 01:04:14,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1359 transitions. [2021-11-07 01:04:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:04:14,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:14,443 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 01:04:14,444 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1187933713, now seen corresponding path program 1 times [2021-11-07 01:04:14,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:14,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471238665] [2021-11-07 01:04:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:14,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:14,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:14,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471238665] [2021-11-07 01:04:14,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471238665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:14,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:14,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:04:14,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484422929] [2021-11-07 01:04:14,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:14,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:14,584 INFO L87 Difference]: Start difference. First operand 1047 states and 1359 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:15,271 INFO L93 Difference]: Finished difference Result 1997 states and 2611 transitions. [2021-11-07 01:04:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:04:15,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:04:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:15,276 INFO L225 Difference]: With dead ends: 1997 [2021-11-07 01:04:15,276 INFO L226 Difference]: Without dead ends: 1049 [2021-11-07 01:04:15,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:04:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-11-07 01:04:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1047. [2021-11-07 01:04:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 1.2973231357552581) internal successors, (1357), 1046 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1357 transitions. [2021-11-07 01:04:15,835 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1357 transitions. Word has length 95 [2021-11-07 01:04:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:15,836 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1357 transitions. [2021-11-07 01:04:15,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1357 transitions. [2021-11-07 01:04:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:04:15,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:15,837 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:15,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 01:04:15,838 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash 746842782, now seen corresponding path program 1 times [2021-11-07 01:04:15,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:15,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691339295] [2021-11-07 01:04:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:15,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:15,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:15,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691339295] [2021-11-07 01:04:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691339295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:15,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:15,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:15,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750521984] [2021-11-07 01:04:15,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:15,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:15,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:15,892 INFO L87 Difference]: Start difference. First operand 1047 states and 1357 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:16,703 INFO L93 Difference]: Finished difference Result 2229 states and 2919 transitions. [2021-11-07 01:04:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:16,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:04:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:16,708 INFO L225 Difference]: With dead ends: 2229 [2021-11-07 01:04:16,708 INFO L226 Difference]: Without dead ends: 1281 [2021-11-07 01:04:16,710 INFO L786 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 [2021-11-07 01:04:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-11-07 01:04:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1279. [2021-11-07 01:04:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 1.2918622848200314) internal successors, (1651), 1278 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1651 transitions. [2021-11-07 01:04:17,372 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1651 transitions. Word has length 95 [2021-11-07 01:04:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:17,372 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1651 transitions. [2021-11-07 01:04:17,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1651 transitions. [2021-11-07 01:04:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:04:17,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:17,374 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:17,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 01:04:17,374 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:17,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -910254247, now seen corresponding path program 1 times [2021-11-07 01:04:17,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:17,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910365345] [2021-11-07 01:04:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:17,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:17,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:17,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910365345] [2021-11-07 01:04:17,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910365345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:17,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:17,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:04:17,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978033782] [2021-11-07 01:04:17,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:04:17,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:04:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:04:17,458 INFO L87 Difference]: Start difference. First operand 1279 states and 1651 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:18,592 INFO L93 Difference]: Finished difference Result 1769 states and 2244 transitions. [2021-11-07 01:04:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:04:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 01:04:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:18,600 INFO L225 Difference]: With dead ends: 1769 [2021-11-07 01:04:18,600 INFO L226 Difference]: Without dead ends: 1767 [2021-11-07 01:04:18,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:04:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-11-07 01:04:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1279. [2021-11-07 01:04:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 1.2730829420970267) internal successors, (1627), 1278 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1627 transitions. [2021-11-07 01:04:19,318 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1627 transitions. Word has length 96 [2021-11-07 01:04:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:19,318 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1627 transitions. [2021-11-07 01:04:19,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1627 transitions. [2021-11-07 01:04:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:04:19,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:19,320 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:19,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 01:04:19,321 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1260253036, now seen corresponding path program 1 times [2021-11-07 01:04:19,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:19,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936217563] [2021-11-07 01:04:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:19,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:04:19,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:19,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936217563] [2021-11-07 01:04:19,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936217563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:19,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:19,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:04:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22053880] [2021-11-07 01:04:19,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:04:19,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:04:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:19,512 INFO L87 Difference]: Start difference. First operand 1279 states and 1627 transitions. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:22,938 INFO L93 Difference]: Finished difference Result 5507 states and 7007 transitions. [2021-11-07 01:04:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:04:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 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 110 [2021-11-07 01:04:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:22,955 INFO L225 Difference]: With dead ends: 5507 [2021-11-07 01:04:22,955 INFO L226 Difference]: Without dead ends: 4313 [2021-11-07 01:04:22,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:04:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-11-07 01:04:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 1287. [2021-11-07 01:04:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 1.271384136858476) internal successors, (1635), 1286 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1635 transitions. [2021-11-07 01:04:23,692 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1635 transitions. Word has length 110 [2021-11-07 01:04:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:23,692 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1635 transitions. [2021-11-07 01:04:23,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1635 transitions. [2021-11-07 01:04:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:04:23,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:23,694 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:23,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 01:04:23,694 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 946424460, now seen corresponding path program 1 times [2021-11-07 01:04:23,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:23,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909360357] [2021-11-07 01:04:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:23,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:04:23,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:23,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909360357] [2021-11-07 01:04:23,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909360357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:23,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:23,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:04:23,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631384204] [2021-11-07 01:04:23,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:04:23,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:04:23,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:04:23,813 INFO L87 Difference]: Start difference. First operand 1287 states and 1635 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:25,190 INFO L93 Difference]: Finished difference Result 3211 states and 4096 transitions. [2021-11-07 01:04:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:04:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 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 111 [2021-11-07 01:04:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:25,198 INFO L225 Difference]: With dead ends: 3211 [2021-11-07 01:04:25,198 INFO L226 Difference]: Without dead ends: 2017 [2021-11-07 01:04:25,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:04:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-11-07 01:04:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1279. [2021-11-07 01:04:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 1.2715179968701096) internal successors, (1625), 1278 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1625 transitions. [2021-11-07 01:04:25,995 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1625 transitions. Word has length 111 [2021-11-07 01:04:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:25,996 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1625 transitions. [2021-11-07 01:04:25,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1625 transitions. [2021-11-07 01:04:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:04:25,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:25,998 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:25,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 01:04:25,999 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash -280252689, now seen corresponding path program 1 times [2021-11-07 01:04:25,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:26,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506052787] [2021-11-07 01:04:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:26,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:04:26,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:26,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506052787] [2021-11-07 01:04:26,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506052787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:26,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:26,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 01:04:26,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370887374] [2021-11-07 01:04:26,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:04:26,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:04:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:04:26,516 INFO L87 Difference]: Start difference. First operand 1279 states and 1625 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:28,838 INFO L93 Difference]: Finished difference Result 3672 states and 4698 transitions. [2021-11-07 01:04:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:04:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 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 112 [2021-11-07 01:04:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:28,850 INFO L225 Difference]: With dead ends: 3672 [2021-11-07 01:04:28,851 INFO L226 Difference]: Without dead ends: 2483 [2021-11-07 01:04:28,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:04:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-11-07 01:04:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1289. [2021-11-07 01:04:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 1.2701863354037266) internal successors, (1636), 1288 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1636 transitions. [2021-11-07 01:04:29,568 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1636 transitions. Word has length 112 [2021-11-07 01:04:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:29,569 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1636 transitions. [2021-11-07 01:04:29,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1636 transitions. [2021-11-07 01:04:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:04:29,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:29,574 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 01:04:29,574 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-07 01:04:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1144744644, now seen corresponding path program 1 times [2021-11-07 01:04:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:29,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803516245] [2021-11-07 01:04:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:29,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:31,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:31,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803516245] [2021-11-07 01:04:31,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803516245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:04:31,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986104176] [2021-11-07 01:04:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:31,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:04:31,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:04:31,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:04:31,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e5b550-7645-488f-a923-e2a58f521428/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:04:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 01:04:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:50,055 INFO L328 TraceCheckSpWp]: Computing backward predicates...