./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-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_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/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_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/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_c62cccba-0e81-4736-8bde-99102944110c/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 92f84e18d7f713cb4a67277cb892c6222831b93652f8c37aad43582713426f96 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:19,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:19,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:19,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:19,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:19,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:19,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:19,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:19,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:19,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:19,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:19,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:19,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:19,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:19,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:19,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:19,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:19,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:19,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:19,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:19,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:19,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:19,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:19,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:19,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:19,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:19,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:19,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:19,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:19,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:19,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:19,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:19,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:19,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:19,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:19,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:19,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:19,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:19,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:19,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:19,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:19,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:55:19,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:19,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:19,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:19,365 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:19,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:19,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:19,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:55:19,366 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:19,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:19,366 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:55:19,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:55:19,368 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:19,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:55:19,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:55:19,368 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:55:19,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:19,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:19,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:55:19,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:19,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:19,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:19,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:19,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:19,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:19,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:19,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:19,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:19,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:19,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:19,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:19,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:19,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:19,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:19,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:19,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:55:19,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:55:19,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:19,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:19,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:19,377 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_c62cccba-0e81-4736-8bde-99102944110c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92f84e18d7f713cb4a67277cb892c6222831b93652f8c37aad43582713426f96 [2021-11-07 01:55:19,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:19,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:19,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:19,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:19,733 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:19,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-11-07 01:55:19,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/data/b5e3d2239/b6f67f2e6ebd4df0ba9576cdfc9c27de/FLAG441a63372 [2021-11-07 01:55:20,436 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:20,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-11-07 01:55:20,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/data/b5e3d2239/b6f67f2e6ebd4df0ba9576cdfc9c27de/FLAG441a63372 [2021-11-07 01:55:20,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/data/b5e3d2239/b6f67f2e6ebd4df0ba9576cdfc9c27de [2021-11-07 01:55:20,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:20,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:20,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:20,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:20,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:20,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:20" (1/1) ... [2021-11-07 01:55:20,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d39d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:20, skipping insertion in model container [2021-11-07 01:55:20,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:20" (1/1) ... [2021-11-07 01:55:20,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:20,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:21,120 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[7545,7558] [2021-11-07 01:55:21,161 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[10452,10465] [2021-11-07 01:55:21,178 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[11543,11556] [2021-11-07 01:55:21,196 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[12149,12162] [2021-11-07 01:55:21,205 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[13568,13581] [2021-11-07 01:55:21,210 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14174,14187] [2021-11-07 01:55:21,216 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15145,15158] [2021-11-07 01:55:21,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:21,278 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:55:21,374 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[7545,7558] [2021-11-07 01:55:21,411 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[10452,10465] [2021-11-07 01:55:21,417 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[11543,11556] [2021-11-07 01:55:21,421 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[12149,12162] [2021-11-07 01:55:21,428 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[13568,13581] [2021-11-07 01:55:21,432 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14174,14187] [2021-11-07 01:55:21,437 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_c62cccba-0e81-4736-8bde-99102944110c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15145,15158] [2021-11-07 01:55:21,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:21,509 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:55:21,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21 WrapperNode [2021-11-07 01:55:21,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:21,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:21,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:55:21,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:55:21,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:21,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:55:21,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:55:21,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:55:21,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:55:21,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:55:21,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:55:21,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:55:21,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (1/1) ... [2021-11-07 01:55:21,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:21,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:21,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:55:21,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:55:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:55:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:55:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:55:21,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:55:22,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:55:22,959 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:55:22,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:22 BoogieIcfgContainer [2021-11-07 01:55:22,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:55:22,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:55:22,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:55:22,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:55:22,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:20" (1/3) ... [2021-11-07 01:55:22,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b60c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:22, skipping insertion in model container [2021-11-07 01:55:22,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:21" (2/3) ... [2021-11-07 01:55:22,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b60c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:22, skipping insertion in model container [2021-11-07 01:55:22,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:22" (3/3) ... [2021-11-07 01:55:22,973 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2021-11-07 01:55:22,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:55:22,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 01:55:23,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:55:23,073 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 01:55:23,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 01:55:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 184 states have (on average 1.8315217391304348) internal successors, (337), 191 states have internal predecessors, (337), 0 states have call successors, (0), 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 01:55:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:55:23,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:23,111 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] [2021-11-07 01:55:23,112 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash -89848275, now seen corresponding path program 1 times [2021-11-07 01:55:23,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:23,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61422204] [2021-11-07 01:55:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:23,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:23,644 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 01:55:23,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:23,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61422204] [2021-11-07 01:55:23,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61422204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:23,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:23,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:55:23,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73007391] [2021-11-07 01:55:23,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:55:23,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:55:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:55:23,673 INFO L87 Difference]: Start difference. First operand has 192 states, 184 states have (on average 1.8315217391304348) internal successors, (337), 191 states have internal predecessors, (337), 0 states have call successors, (0), 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 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 01:55:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:24,084 INFO L93 Difference]: Finished difference Result 308 states and 517 transitions. [2021-11-07 01:55:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-07 01:55:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:24,100 INFO L225 Difference]: With dead ends: 308 [2021-11-07 01:55:24,100 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 01:55:24,104 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 01:55:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 01:55:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-07 01:55:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 163 states have (on average 1.2269938650306749) internal successors, (200), 169 states have internal predecessors, (200), 0 states have call successors, (0), 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 01:55:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2021-11-07 01:55:24,167 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 46 [2021-11-07 01:55:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:24,167 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2021-11-07 01:55:24,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 01:55:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2021-11-07 01:55:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:55:24,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:24,172 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] [2021-11-07 01:55:24,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:55:24,172 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 461144478, now seen corresponding path program 1 times [2021-11-07 01:55:24,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:24,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001729282] [2021-11-07 01:55:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:24,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:24,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:24,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001729282] [2021-11-07 01:55:24,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001729282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:24,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:24,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:55:24,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950737256] [2021-11-07 01:55:24,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:55:24,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:55:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:55:24,372 INFO L87 Difference]: Start difference. First operand 170 states and 200 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:55:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:24,621 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2021-11-07 01:55:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 01:55:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:24,628 INFO L225 Difference]: With dead ends: 280 [2021-11-07 01:55:24,628 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 01:55:24,630 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 01:55:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 01:55:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-07 01:55:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 153 states have internal predecessors, (181), 0 states have call successors, (0), 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 01:55:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2021-11-07 01:55:24,668 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 47 [2021-11-07 01:55:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:24,668 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2021-11-07 01:55:24,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:55:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2021-11-07 01:55:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:55:24,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:24,671 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] [2021-11-07 01:55:24,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:55:24,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 486947662, now seen corresponding path program 1 times [2021-11-07 01:55:24,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:24,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646456218] [2021-11-07 01:55:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:24,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:24,868 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 01:55:24,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:24,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646456218] [2021-11-07 01:55:24,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646456218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:24,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:24,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:55:24,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937415769] [2021-11-07 01:55:24,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:55:24,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:55:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:55:24,872 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 01:55:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:25,072 INFO L93 Difference]: Finished difference Result 335 states and 404 transitions. [2021-11-07 01:55:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 01:55:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:25,075 INFO L225 Difference]: With dead ends: 335 [2021-11-07 01:55:25,075 INFO L226 Difference]: Without dead ends: 214 [2021-11-07 01:55:25,076 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 01:55:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-07 01:55:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-11-07 01:55:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 183 states have (on average 1.2677595628415301) internal successors, (232), 189 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2021-11-07 01:55:25,098 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 48 [2021-11-07 01:55:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:25,098 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2021-11-07 01:55:25,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 01:55:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2021-11-07 01:55:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:55:25,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:25,101 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] [2021-11-07 01:55:25,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:55:25,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1739674480, now seen corresponding path program 1 times [2021-11-07 01:55:25,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:25,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161324187] [2021-11-07 01:55:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:25,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:25,287 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 01:55:25,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:25,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161324187] [2021-11-07 01:55:25,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161324187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:25,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:25,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:55:25,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862037565] [2021-11-07 01:55:25,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:55:25,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:55:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:25,290 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:55:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:25,812 INFO L93 Difference]: Finished difference Result 427 states and 535 transitions. [2021-11-07 01:55:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:55:25,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-07 01:55:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:25,816 INFO L225 Difference]: With dead ends: 427 [2021-11-07 01:55:25,816 INFO L226 Difference]: Without dead ends: 422 [2021-11-07 01:55:25,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:55:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-07 01:55:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 190. [2021-11-07 01:55:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 183 states have (on average 1.2622950819672132) internal successors, (231), 189 states have internal predecessors, (231), 0 states have call successors, (0), 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 01:55:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 231 transitions. [2021-11-07 01:55:25,856 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 231 transitions. Word has length 49 [2021-11-07 01:55:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:25,857 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 231 transitions. [2021-11-07 01:55:25,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:55:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 231 transitions. [2021-11-07 01:55:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:55:25,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:25,860 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] [2021-11-07 01:55:25,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:55:25,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -643095714, now seen corresponding path program 1 times [2021-11-07 01:55:25,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:25,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741216451] [2021-11-07 01:55:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:25,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:26,003 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 01:55:26,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:26,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741216451] [2021-11-07 01:55:26,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741216451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:26,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:26,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:55:26,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059841839] [2021-11-07 01:55:26,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:55:26,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:26,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:55:26,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:26,008 INFO L87 Difference]: Start difference. First operand 190 states and 231 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:55:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:26,579 INFO L93 Difference]: Finished difference Result 402 states and 499 transitions. [2021-11-07 01:55:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:55:26,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-07 01:55:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:26,583 INFO L225 Difference]: With dead ends: 402 [2021-11-07 01:55:26,583 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 01:55:26,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:55:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 01:55:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 190. [2021-11-07 01:55:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 183 states have (on average 1.2568306010928962) internal successors, (230), 189 states have internal predecessors, (230), 0 states have call successors, (0), 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 01:55:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 230 transitions. [2021-11-07 01:55:26,608 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 230 transitions. Word has length 49 [2021-11-07 01:55:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:26,609 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 230 transitions. [2021-11-07 01:55:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:55:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 230 transitions. [2021-11-07 01:55:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:55:26,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:26,620 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] [2021-11-07 01:55:26,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:55:26,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 630687196, now seen corresponding path program 1 times [2021-11-07 01:55:26,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:26,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642025274] [2021-11-07 01:55:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:26,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:26,810 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 01:55:26,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:26,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642025274] [2021-11-07 01:55:26,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642025274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:26,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:26,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:55:26,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723006682] [2021-11-07 01:55:26,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:55:26,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:55:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:55:26,819 INFO L87 Difference]: Start difference. First operand 190 states and 230 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:55:27,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:27,141 INFO L93 Difference]: Finished difference Result 382 states and 465 transitions. [2021-11-07 01:55:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:55:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-07 01:55:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:27,144 INFO L225 Difference]: With dead ends: 382 [2021-11-07 01:55:27,144 INFO L226 Difference]: Without dead ends: 284 [2021-11-07 01:55:27,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:55:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-07 01:55:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 190. [2021-11-07 01:55:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 183 states have (on average 1.2513661202185793) internal successors, (229), 189 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2021-11-07 01:55:27,169 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 49 [2021-11-07 01:55:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:27,171 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2021-11-07 01:55:27,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:55:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2021-11-07 01:55:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:55:27,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:27,172 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] [2021-11-07 01:55:27,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:55:27,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:27,174 INFO L85 PathProgramCache]: Analyzing trace with hash -773609523, now seen corresponding path program 1 times [2021-11-07 01:55:27,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:27,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475156757] [2021-11-07 01:55:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:27,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:27,613 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 01:55:27,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:27,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475156757] [2021-11-07 01:55:27,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475156757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:27,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:27,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 01:55:27,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596321459] [2021-11-07 01:55:27,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:55:27,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:55:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:27,617 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:28,189 INFO L93 Difference]: Finished difference Result 418 states and 515 transitions. [2021-11-07 01:55:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:55:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:55:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:28,193 INFO L225 Difference]: With dead ends: 418 [2021-11-07 01:55:28,193 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 01:55:28,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:55:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 01:55:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 157. [2021-11-07 01:55:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.2418300653594772) internal successors, (190), 156 states have internal predecessors, (190), 0 states have call successors, (0), 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 01:55:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 190 transitions. [2021-11-07 01:55:28,228 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 190 transitions. Word has length 51 [2021-11-07 01:55:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:28,228 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 190 transitions. [2021-11-07 01:55:28,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 190 transitions. [2021-11-07 01:55:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:55:28,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:28,230 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] [2021-11-07 01:55:28,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:55:28,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1216664806, now seen corresponding path program 1 times [2021-11-07 01:55:28,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:28,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444726037] [2021-11-07 01:55:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:28,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:28,898 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 01:55:28,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:28,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444726037] [2021-11-07 01:55:28,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444726037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:28,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:28,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-07 01:55:28,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494406745] [2021-11-07 01:55:28,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:55:28,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:55:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:55:28,900 INFO L87 Difference]: Start difference. First operand 157 states and 190 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:30,356 INFO L93 Difference]: Finished difference Result 288 states and 344 transitions. [2021-11-07 01:55:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:55:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:55:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:30,360 INFO L225 Difference]: With dead ends: 288 [2021-11-07 01:55:30,360 INFO L226 Difference]: Without dead ends: 284 [2021-11-07 01:55:30,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:55:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-07 01:55:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 161. [2021-11-07 01:55:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 160 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 196 transitions. [2021-11-07 01:55:30,394 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 196 transitions. Word has length 51 [2021-11-07 01:55:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:30,395 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 196 transitions. [2021-11-07 01:55:30,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 196 transitions. [2021-11-07 01:55:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:55:30,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:30,396 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] [2021-11-07 01:55:30,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:55:30,398 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1325506394, now seen corresponding path program 1 times [2021-11-07 01:55:30,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:30,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991973887] [2021-11-07 01:55:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:30,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:30,923 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 01:55:30,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:30,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991973887] [2021-11-07 01:55:30,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991973887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:30,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:30,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 01:55:30,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458515976] [2021-11-07 01:55:30,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:55:30,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:55:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:55:30,930 INFO L87 Difference]: Start difference. First operand 161 states and 196 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:31,712 INFO L93 Difference]: Finished difference Result 395 states and 495 transitions. [2021-11-07 01:55:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:55:31,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:55:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:31,716 INFO L225 Difference]: With dead ends: 395 [2021-11-07 01:55:31,716 INFO L226 Difference]: Without dead ends: 375 [2021-11-07 01:55:31,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:55:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-07 01:55:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 141. [2021-11-07 01:55:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 140 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 171 transitions. [2021-11-07 01:55:31,749 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 171 transitions. Word has length 52 [2021-11-07 01:55:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:31,749 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 171 transitions. [2021-11-07 01:55:31,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 171 transitions. [2021-11-07 01:55:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:55:31,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:31,751 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] [2021-11-07 01:55:31,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:55:31,751 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1642323263, now seen corresponding path program 1 times [2021-11-07 01:55:31,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:31,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688478653] [2021-11-07 01:55:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:31,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:31,946 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 01:55:31,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:31,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688478653] [2021-11-07 01:55:31,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688478653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:31,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:31,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 01:55:31,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253241820] [2021-11-07 01:55:31,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:55:31,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:55:31,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:31,955 INFO L87 Difference]: Start difference. First operand 141 states and 171 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:32,450 INFO L93 Difference]: Finished difference Result 245 states and 304 transitions. [2021-11-07 01:55:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:55:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:55:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:32,452 INFO L225 Difference]: With dead ends: 245 [2021-11-07 01:55:32,452 INFO L226 Difference]: Without dead ends: 157 [2021-11-07 01:55:32,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:55:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-07 01:55:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2021-11-07 01:55:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 140 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 169 transitions. [2021-11-07 01:55:32,484 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 169 transitions. Word has length 52 [2021-11-07 01:55:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:32,485 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 169 transitions. [2021-11-07 01:55:32,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 169 transitions. [2021-11-07 01:55:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:55:32,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:32,486 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] [2021-11-07 01:55:32,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:55:32,487 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1207922866, now seen corresponding path program 1 times [2021-11-07 01:55:32,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:32,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273915370] [2021-11-07 01:55:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:32,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:33,028 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 01:55:33,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:33,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273915370] [2021-11-07 01:55:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273915370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:33,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:33,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:55:33,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144415865] [2021-11-07 01:55:33,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:55:33,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:55:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:55:33,031 INFO L87 Difference]: Start difference. First operand 141 states and 169 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:34,216 INFO L93 Difference]: Finished difference Result 477 states and 607 transitions. [2021-11-07 01:55:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:55:34,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:55:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:34,220 INFO L225 Difference]: With dead ends: 477 [2021-11-07 01:55:34,220 INFO L226 Difference]: Without dead ends: 471 [2021-11-07 01:55:34,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:55:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-07 01:55:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 147. [2021-11-07 01:55:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.2206896551724138) internal successors, (177), 146 states have internal predecessors, (177), 0 states have call successors, (0), 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 01:55:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2021-11-07 01:55:34,269 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 54 [2021-11-07 01:55:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:34,269 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2021-11-07 01:55:34,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2021-11-07 01:55:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:55:34,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:34,273 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] [2021-11-07 01:55:34,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:55:34,274 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1871811698, now seen corresponding path program 1 times [2021-11-07 01:55:34,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:34,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749897281] [2021-11-07 01:55:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:34,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:34,659 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 01:55:34,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:34,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749897281] [2021-11-07 01:55:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749897281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:34,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:34,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 01:55:34,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585033985] [2021-11-07 01:55:34,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:55:34,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:55:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:55:34,661 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:35,881 INFO L93 Difference]: Finished difference Result 625 states and 798 transitions. [2021-11-07 01:55:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:55:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:55:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:35,885 INFO L225 Difference]: With dead ends: 625 [2021-11-07 01:55:35,885 INFO L226 Difference]: Without dead ends: 619 [2021-11-07 01:55:35,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:55:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-07 01:55:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 135. [2021-11-07 01:55:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.208955223880597) internal successors, (162), 134 states have internal predecessors, (162), 0 states have call successors, (0), 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 01:55:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2021-11-07 01:55:35,924 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 55 [2021-11-07 01:55:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:35,924 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2021-11-07 01:55:35,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2021-11-07 01:55:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:55:35,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:35,926 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] [2021-11-07 01:55:35,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:55:35,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash -205702261, now seen corresponding path program 1 times [2021-11-07 01:55:35,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:35,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356468460] [2021-11-07 01:55:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:35,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:36,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:36,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356468460] [2021-11-07 01:55:36,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356468460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:36,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:36,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:55:36,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467616769] [2021-11-07 01:55:36,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:36,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:36,014 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:36,075 INFO L93 Difference]: Finished difference Result 202 states and 251 transitions. [2021-11-07 01:55:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:55:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:36,077 INFO L225 Difference]: With dead ends: 202 [2021-11-07 01:55:36,077 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 01:55:36,078 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 01:55:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 01:55:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-11-07 01:55:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2236024844720497) internal successors, (197), 161 states have internal predecessors, (197), 0 states have call successors, (0), 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 01:55:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2021-11-07 01:55:36,121 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 66 [2021-11-07 01:55:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:36,121 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2021-11-07 01:55:36,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2021-11-07 01:55:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:55:36,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:36,122 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] [2021-11-07 01:55:36,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:55:36,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash 338549682, now seen corresponding path program 1 times [2021-11-07 01:55:36,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:36,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227265324] [2021-11-07 01:55:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:36,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:36,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:36,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227265324] [2021-11-07 01:55:36,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227265324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:36,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:36,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:55:36,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77283345] [2021-11-07 01:55:36,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:36,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:36,171 INFO L87 Difference]: Start difference. First operand 162 states and 197 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:36,256 INFO L93 Difference]: Finished difference Result 326 states and 417 transitions. [2021-11-07 01:55:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:36,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:55:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:36,258 INFO L225 Difference]: With dead ends: 326 [2021-11-07 01:55:36,258 INFO L226 Difference]: Without dead ends: 244 [2021-11-07 01:55:36,259 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 01:55:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-07 01:55:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 230. [2021-11-07 01:55:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.25764192139738) internal successors, (288), 229 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 288 transitions. [2021-11-07 01:55:36,319 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 288 transitions. Word has length 69 [2021-11-07 01:55:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:36,319 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 288 transitions. [2021-11-07 01:55:36,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 288 transitions. [2021-11-07 01:55:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:55:36,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:36,320 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] [2021-11-07 01:55:36,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:55:36,320 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:36,321 INFO L85 PathProgramCache]: Analyzing trace with hash 431938851, now seen corresponding path program 1 times [2021-11-07 01:55:36,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:36,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878268212] [2021-11-07 01:55:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:36,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:36,392 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 01:55:36,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:36,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878268212] [2021-11-07 01:55:36,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878268212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:36,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:55:36,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748813152] [2021-11-07 01:55:36,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:36,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:36,395 INFO L87 Difference]: Start difference. First operand 230 states and 288 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:36,539 INFO L93 Difference]: Finished difference Result 530 states and 690 transitions. [2021-11-07 01:55:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:55:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:36,542 INFO L225 Difference]: With dead ends: 530 [2021-11-07 01:55:36,542 INFO L226 Difference]: Without dead ends: 380 [2021-11-07 01:55:36,543 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 01:55:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-07 01:55:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2021-11-07 01:55:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.2804532577903682) internal successors, (452), 353 states have internal predecessors, (452), 0 states have call successors, (0), 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 01:55:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 452 transitions. [2021-11-07 01:55:36,692 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 452 transitions. Word has length 72 [2021-11-07 01:55:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:36,692 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 452 transitions. [2021-11-07 01:55:36,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 452 transitions. [2021-11-07 01:55:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:55:36,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:36,694 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] [2021-11-07 01:55:36,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:55:36,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash -928058765, now seen corresponding path program 1 times [2021-11-07 01:55:36,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:36,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723420770] [2021-11-07 01:55:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:36,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:36,753 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 01:55:36,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:36,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723420770] [2021-11-07 01:55:36,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723420770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:36,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:36,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:55:36,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614951760] [2021-11-07 01:55:36,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:55:36,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:55:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:55:36,756 INFO L87 Difference]: Start difference. First operand 354 states and 452 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:37,243 INFO L93 Difference]: Finished difference Result 1209 states and 1577 transitions. [2021-11-07 01:55:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:55:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:37,249 INFO L225 Difference]: With dead ends: 1209 [2021-11-07 01:55:37,249 INFO L226 Difference]: Without dead ends: 935 [2021-11-07 01:55:37,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-07 01:55:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 538. [2021-11-07 01:55:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.2737430167597765) internal successors, (684), 537 states have internal predecessors, (684), 0 states have call successors, (0), 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 01:55:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 684 transitions. [2021-11-07 01:55:37,470 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 684 transitions. Word has length 75 [2021-11-07 01:55:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:37,470 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 684 transitions. [2021-11-07 01:55:37,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 684 transitions. [2021-11-07 01:55:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:55:37,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:37,472 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] [2021-11-07 01:55:37,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:55:37,472 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash 197041588, now seen corresponding path program 1 times [2021-11-07 01:55:37,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:37,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101501717] [2021-11-07 01:55:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:37,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:37,514 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 01:55:37,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:37,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101501717] [2021-11-07 01:55:37,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101501717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:37,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:37,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:55:37,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609008886] [2021-11-07 01:55:37,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:37,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:37,517 INFO L87 Difference]: Start difference. First operand 538 states and 684 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 01:55:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:37,767 INFO L93 Difference]: Finished difference Result 998 states and 1282 transitions. [2021-11-07 01:55:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-07 01:55:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:37,771 INFO L225 Difference]: With dead ends: 998 [2021-11-07 01:55:37,771 INFO L226 Difference]: Without dead ends: 540 [2021-11-07 01:55:37,772 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 01:55:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-07 01:55:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 538. [2021-11-07 01:55:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.2700186219739293) internal successors, (682), 537 states have internal predecessors, (682), 0 states have call successors, (0), 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 01:55:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 682 transitions. [2021-11-07 01:55:37,993 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 682 transitions. Word has length 77 [2021-11-07 01:55:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:37,994 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 682 transitions. [2021-11-07 01:55:37,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 01:55:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 682 transitions. [2021-11-07 01:55:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:55:37,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:37,995 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] [2021-11-07 01:55:37,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:55:37,995 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash 31731329, now seen corresponding path program 1 times [2021-11-07 01:55:37,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:37,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059673043] [2021-11-07 01:55:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:37,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:38,033 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 01:55:38,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:38,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059673043] [2021-11-07 01:55:38,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059673043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:38,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:38,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:55:38,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588202987] [2021-11-07 01:55:38,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:38,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:38,036 INFO L87 Difference]: Start difference. First operand 538 states and 682 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 01:55:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:38,336 INFO L93 Difference]: Finished difference Result 1110 states and 1426 transitions. [2021-11-07 01:55:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-07 01:55:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:38,341 INFO L225 Difference]: With dead ends: 1110 [2021-11-07 01:55:38,341 INFO L226 Difference]: Without dead ends: 652 [2021-11-07 01:55:38,342 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 01:55:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-07 01:55:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 650. [2021-11-07 01:55:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.263482280431433) internal successors, (820), 649 states have internal predecessors, (820), 0 states have call successors, (0), 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 01:55:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 820 transitions. [2021-11-07 01:55:38,617 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 820 transitions. Word has length 77 [2021-11-07 01:55:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 820 transitions. [2021-11-07 01:55:38,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 01:55:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 820 transitions. [2021-11-07 01:55:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:55:38,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:38,619 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] [2021-11-07 01:55:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:55:38,620 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1936830237, now seen corresponding path program 1 times [2021-11-07 01:55:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:38,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813705299] [2021-11-07 01:55:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:38,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:38,695 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 01:55:38,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813705299] [2021-11-07 01:55:38,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813705299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:38,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:38,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:55:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203297481] [2021-11-07 01:55:38,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:55:38,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:55:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:55:38,698 INFO L87 Difference]: Start difference. First operand 650 states and 820 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:39,260 INFO L93 Difference]: Finished difference Result 857 states and 1068 transitions. [2021-11-07 01:55:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:55:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:55:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:39,265 INFO L225 Difference]: With dead ends: 857 [2021-11-07 01:55:39,265 INFO L226 Difference]: Without dead ends: 855 [2021-11-07 01:55:39,266 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 01:55:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-11-07 01:55:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 650. [2021-11-07 01:55:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.2449922958397535) internal successors, (808), 649 states have internal predecessors, (808), 0 states have call successors, (0), 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 01:55:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 808 transitions. [2021-11-07 01:55:39,574 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 808 transitions. Word has length 78 [2021-11-07 01:55:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:39,575 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 808 transitions. [2021-11-07 01:55:39,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 808 transitions. [2021-11-07 01:55:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:55:39,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:39,577 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:55:39,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:55:39,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1543272581, now seen corresponding path program 1 times [2021-11-07 01:55:39,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:39,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585043640] [2021-11-07 01:55:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:39,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:55:39,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:39,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585043640] [2021-11-07 01:55:39,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585043640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:39,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:39,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:55:39,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67726417] [2021-11-07 01:55:39,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:55:39,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:55:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:55:39,785 INFO L87 Difference]: Start difference. First operand 650 states and 808 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 01:55:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:42,001 INFO L93 Difference]: Finished difference Result 2819 states and 3524 transitions. [2021-11-07 01:55:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:55:42,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 91 [2021-11-07 01:55:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:42,013 INFO L225 Difference]: With dead ends: 2819 [2021-11-07 01:55:42,013 INFO L226 Difference]: Without dead ends: 2234 [2021-11-07 01:55:42,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:55:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-11-07 01:55:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 658. [2021-11-07 01:55:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.2420091324200913) internal successors, (816), 657 states have internal predecessors, (816), 0 states have call successors, (0), 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 01:55:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 816 transitions. [2021-11-07 01:55:42,284 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 816 transitions. Word has length 91 [2021-11-07 01:55:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:42,285 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 816 transitions. [2021-11-07 01:55:42,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 01:55:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 816 transitions. [2021-11-07 01:55:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:55:42,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:42,287 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:55:42,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:55:42,287 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash 169617143, now seen corresponding path program 1 times [2021-11-07 01:55:42,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:42,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95086874] [2021-11-07 01:55:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:42,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:55:42,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:42,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95086874] [2021-11-07 01:55:42,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95086874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:42,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:42,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:55:42,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793337185] [2021-11-07 01:55:42,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:55:42,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:42,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:55:42,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:42,390 INFO L87 Difference]: Start difference. First operand 658 states and 816 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:55:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:43,135 INFO L93 Difference]: Finished difference Result 1625 states and 2028 transitions. [2021-11-07 01:55:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:55:43,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 92 [2021-11-07 01:55:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:43,141 INFO L225 Difference]: With dead ends: 1625 [2021-11-07 01:55:43,141 INFO L226 Difference]: Without dead ends: 1040 [2021-11-07 01:55:43,142 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 01:55:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-07 01:55:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 650. [2021-11-07 01:55:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.2419106317411401) internal successors, (806), 649 states have internal predecessors, (806), 0 states have call successors, (0), 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 01:55:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 806 transitions. [2021-11-07 01:55:43,420 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 806 transitions. Word has length 92 [2021-11-07 01:55:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:43,420 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 806 transitions. [2021-11-07 01:55:43,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:55:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 806 transitions. [2021-11-07 01:55:43,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:55:43,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:43,422 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:55:43,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:55:43,423 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:43,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash -329093602, now seen corresponding path program 1 times [2021-11-07 01:55:43,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:43,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155461771] [2021-11-07 01:55:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:43,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:55:43,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:43,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155461771] [2021-11-07 01:55:43,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155461771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:43,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:43,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:55:43,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376221838] [2021-11-07 01:55:43,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:55:43,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:55:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:55:43,809 INFO L87 Difference]: Start difference. First operand 650 states and 806 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:55:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:45,233 INFO L93 Difference]: Finished difference Result 1816 states and 2275 transitions. [2021-11-07 01:55:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:55:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:55:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:45,240 INFO L225 Difference]: With dead ends: 1816 [2021-11-07 01:55:45,240 INFO L226 Difference]: Without dead ends: 1236 [2021-11-07 01:55:45,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:55:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-11-07 01:55:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 655. [2021-11-07 01:55:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.2400611620795108) internal successors, (811), 654 states have internal predecessors, (811), 0 states have call successors, (0), 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 01:55:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 811 transitions. [2021-11-07 01:55:45,499 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 811 transitions. Word has length 93 [2021-11-07 01:55:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:45,500 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 811 transitions. [2021-11-07 01:55:45,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:55:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 811 transitions. [2021-11-07 01:55:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:55:45,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:45,501 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:55:45,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:55:45,502 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:45,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1929222045, now seen corresponding path program 1 times [2021-11-07 01:55:45,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:45,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196085792] [2021-11-07 01:55:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:45,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:55:45,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:45,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196085792] [2021-11-07 01:55:45,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196085792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:45,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:45,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:55:45,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785920884] [2021-11-07 01:55:45,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:45,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:55:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:45,544 INFO L87 Difference]: Start difference. First operand 655 states and 811 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:55:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:45,860 INFO L93 Difference]: Finished difference Result 1057 states and 1322 transitions. [2021-11-07 01:55:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 94 [2021-11-07 01:55:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:45,864 INFO L225 Difference]: With dead ends: 1057 [2021-11-07 01:55:45,864 INFO L226 Difference]: Without dead ends: 655 [2021-11-07 01:55:45,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:55:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-07 01:55:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 470. [2021-11-07 01:55:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.2174840085287846) internal successors, (571), 469 states have internal predecessors, (571), 0 states have call successors, (0), 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 01:55:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 571 transitions. [2021-11-07 01:55:46,147 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 571 transitions. Word has length 94 [2021-11-07 01:55:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:46,148 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 571 transitions. [2021-11-07 01:55:46,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:55:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 571 transitions. [2021-11-07 01:55:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:55:46,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:46,150 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:55:46,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:55:46,151 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1292660130, now seen corresponding path program 1 times [2021-11-07 01:55:46,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:55:46,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535792578] [2021-11-07 01:55:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:46,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:55:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:47,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:55:47,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535792578] [2021-11-07 01:55:47,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535792578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:55:47,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309871420] [2021-11-07 01:55:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:47,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:55:47,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:47,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:55:47,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c62cccba-0e81-4736-8bde-99102944110c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:55:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:47,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 01:55:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:55,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:17,149 WARN L207 SmtUtils]: Spent 49.02 s on a formula simplification. DAG size of input: 327 DAG size of output: 326