./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.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_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/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_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/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_c6d3c783-276e-4201-9339-17ab93cffda3/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 f1b965f33911949d5293afac2c8bd242d07bfd4e9981eefc7864b2608138df3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:00:30,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:00:30,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:00:30,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:00:30,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:00:30,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:00:30,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:00:30,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:00:30,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:00:30,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:00:30,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:00:30,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:00:30,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:00:30,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:00:30,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:00:30,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:00:30,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:00:30,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:00:30,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:00:30,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:00:30,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:00:30,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:00:30,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:00:30,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:00:30,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:00:30,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:00:30,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:00:30,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:00:30,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:00:30,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:00:30,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:00:30,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:00:30,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:00:30,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:00:30,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:00:30,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:00:30,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:00:30,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:00:30,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:00:30,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:00:30,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:00:30,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:00:30,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:00:30,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:00:30,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:00:30,507 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:00:30,507 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:00:30,507 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:00:30,507 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:00:30,507 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:00:30,508 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:00:30,508 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:00:30,508 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:00:30,508 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:00:30,509 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:00:30,509 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:00:30,509 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:00:30,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:00:30,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:00:30,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:00:30,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:00:30,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:00:30,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:00:30,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:00:30,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:00:30,511 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:00:30,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:00:30,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:00:30,512 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:00:30,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:00:30,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:00:30,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:00:30,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:00:30,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:00:30,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:00:30,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:00:30,514 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:00:30,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:00:30,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:00:30,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:00:30,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:00:30,515 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_c6d3c783-276e-4201-9339-17ab93cffda3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b965f33911949d5293afac2c8bd242d07bfd4e9981eefc7864b2608138df3f [2021-11-07 01:00:30,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:00:30,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:00:30,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:00:30,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:00:30,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:00:30,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-07 01:00:30,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/data/14cd87722/7e33b929f6da43b2a27589b36ffb938e/FLAG7880e8015 [2021-11-07 01:00:31,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:00:31,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-07 01:00:31,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/data/14cd87722/7e33b929f6da43b2a27589b36ffb938e/FLAG7880e8015 [2021-11-07 01:00:31,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/data/14cd87722/7e33b929f6da43b2a27589b36ffb938e [2021-11-07 01:00:31,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:00:31,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:00:31,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:00:31,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:00:31,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:00:31,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:31" (1/1) ... [2021-11-07 01:00:31,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d58ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:31, skipping insertion in model container [2021-11-07 01:00:31,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:31" (1/1) ... [2021-11-07 01:00:31,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:00:32,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:00:32,437 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[11900,11913] [2021-11-07 01:00:32,525 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18638,18651] [2021-11-07 01:00:32,546 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20836,20849] [2021-11-07 01:00:32,571 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21913,21926] [2021-11-07 01:00:32,617 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[25266,25279] [2021-11-07 01:00:32,634 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26346,26359] [2021-11-07 01:00:32,649 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28575,28588] [2021-11-07 01:00:33,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:00:33,219 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:00:33,309 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[11900,11913] [2021-11-07 01:00:33,350 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18638,18651] [2021-11-07 01:00:33,362 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[20836,20849] [2021-11-07 01:00:33,369 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[21913,21926] [2021-11-07 01:00:33,386 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[25266,25279] [2021-11-07 01:00:33,390 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26346,26359] [2021-11-07 01:00:33,398 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_c6d3c783-276e-4201-9339-17ab93cffda3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28575,28588] [2021-11-07 01:00:33,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:00:33,728 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:00:33,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33 WrapperNode [2021-11-07 01:00:33,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:00:33,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:00:33,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:00:33,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:00:33,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:33,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:00:34,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:00:34,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:00:34,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:00:34,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:00:34,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:00:34,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:00:34,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:00:34,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (1/1) ... [2021-11-07 01:00:34,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:00:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:00:34,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:00:34,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6d3c783-276e-4201-9339-17ab93cffda3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:00:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:00:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:00:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:00:34,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:00:38,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:00:38,129 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:00:38,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:38 BoogieIcfgContainer [2021-11-07 01:00:38,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:00:38,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:00:38,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:00:38,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:00:38,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:00:31" (1/3) ... [2021-11-07 01:00:38,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da6699d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:38, skipping insertion in model container [2021-11-07 01:00:38,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:33" (2/3) ... [2021-11-07 01:00:38,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da6699d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:38, skipping insertion in model container [2021-11-07 01:00:38,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:38" (3/3) ... [2021-11-07 01:00:38,142 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-07 01:00:38,148 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:00:38,148 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 01:00:38,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:00:38,208 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 01:00:38,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 01:00:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 1054 states, 1046 states have (on average 1.8948374760994264) internal successors, (1982), 1053 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states 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 01:00:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:00:38,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:38,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:38,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash -966255617, now seen corresponding path program 1 times [2021-11-07 01:00:38,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:38,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805925569] [2021-11-07 01:00:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:38,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:38,762 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 01:00:38,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:38,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805925569] [2021-11-07 01:00:38,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805925569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:38,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:38,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:00:38,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049031766] [2021-11-07 01:00:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:38,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:38,801 INFO L87 Difference]: Start difference. First operand has 1054 states, 1046 states have (on average 1.8948374760994264) internal successors, (1982), 1053 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:39,780 INFO L93 Difference]: Finished difference Result 1560 states and 2852 transitions. [2021-11-07 01:00:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:00:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:39,808 INFO L225 Difference]: With dead ends: 1560 [2021-11-07 01:00:39,808 INFO L226 Difference]: Without dead ends: 985 [2021-11-07 01:00:39,817 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 01:00:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-11-07 01:00:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 977. [2021-11-07 01:00:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 970 states have (on average 1.288659793814433) internal successors, (1250), 976 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 01:00:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1250 transitions. [2021-11-07 01:00:39,915 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1250 transitions. Word has length 62 [2021-11-07 01:00:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:39,916 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1250 transitions. [2021-11-07 01:00:39,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1250 transitions. [2021-11-07 01:00:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:00:39,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:39,920 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:39,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:00:39,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1187989298, now seen corresponding path program 1 times [2021-11-07 01:00:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:39,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417920746] [2021-11-07 01:00:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:39,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:40,094 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 01:00:40,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:40,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417920746] [2021-11-07 01:00:40,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417920746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:40,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:40,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:00:40,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508803871] [2021-11-07 01:00:40,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:00:40,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:00:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:00:40,101 INFO L87 Difference]: Start difference. First operand 977 states and 1250 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:40,251 INFO L93 Difference]: Finished difference Result 1420 states and 1870 transitions. [2021-11-07 01:00:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:00:40,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:00:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:40,258 INFO L225 Difference]: With dead ends: 1420 [2021-11-07 01:00:40,259 INFO L226 Difference]: Without dead ends: 1207 [2021-11-07 01:00:40,260 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 01:00:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-11-07 01:00:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1199. [2021-11-07 01:00:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1192 states have (on average 1.308724832214765) internal successors, (1560), 1198 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 01:00:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1560 transitions. [2021-11-07 01:00:40,313 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1560 transitions. Word has length 62 [2021-11-07 01:00:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:40,314 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1560 transitions. [2021-11-07 01:00:40,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1560 transitions. [2021-11-07 01:00:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:00:40,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:40,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:40,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:00:40,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash -369366517, now seen corresponding path program 1 times [2021-11-07 01:00:40,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:40,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285050788] [2021-11-07 01:00:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:40,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:40,398 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 01:00:40,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:40,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285050788] [2021-11-07 01:00:40,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285050788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:40,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:40,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:00:40,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141370079] [2021-11-07 01:00:40,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:00:40,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:00:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:00:40,401 INFO L87 Difference]: Start difference. First operand 1199 states and 1560 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:40,507 INFO L93 Difference]: Finished difference Result 1898 states and 2558 transitions. [2021-11-07 01:00:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:00:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:00:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:40,516 INFO L225 Difference]: With dead ends: 1898 [2021-11-07 01:00:40,516 INFO L226 Difference]: Without dead ends: 1524 [2021-11-07 01:00:40,518 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 01:00:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-11-07 01:00:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1516. [2021-11-07 01:00:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1509 states have (on average 1.333996023856859) internal successors, (2013), 1515 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states 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 01:00:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2013 transitions. [2021-11-07 01:00:40,584 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2013 transitions. Word has length 62 [2021-11-07 01:00:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:40,585 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 2013 transitions. [2021-11-07 01:00:40,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2013 transitions. [2021-11-07 01:00:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:00:40,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:40,589 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:40,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:00:40,590 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 01:00:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1656441469, now seen corresponding path program 1 times [2021-11-07 01:00:40,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:40,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361612777] [2021-11-07 01:00:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:40,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:40,708 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 01:00:40,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:40,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361612777] [2021-11-07 01:00:40,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361612777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:40,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:40,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:00:40,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213586092] [2021-11-07 01:00:40,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:40,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:40,712 INFO L87 Difference]: Start difference. First operand 1516 states and 2013 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:41,337 INFO L93 Difference]: Finished difference Result 3183 states and 4339 transitions. [2021-11-07 01:00:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:41,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:00:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:41,350 INFO L225 Difference]: With dead ends: 3183 [2021-11-07 01:00:41,350 INFO L226 Difference]: Without dead ends: 1914 [2021-11-07 01:00:41,352 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 01:00:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-11-07 01:00:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1906. [2021-11-07 01:00:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1899 states have (on average 1.3696682464454977) internal successors, (2601), 1905 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states 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 01:00:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2601 transitions. [2021-11-07 01:00:41,466 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2601 transitions. Word has length 62 [2021-11-07 01:00:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:41,466 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 2601 transitions. [2021-11-07 01:00:41,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2601 transitions. [2021-11-07 01:00:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:00:41,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:41,470 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] [2021-11-07 01:00:41,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:00:41,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1951931054, now seen corresponding path program 1 times [2021-11-07 01:00:41,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:41,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951453618] [2021-11-07 01:00:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:41,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:41,530 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 01:00:41,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:41,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951453618] [2021-11-07 01:00:41,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951453618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:41,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:41,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:00:41,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804227131] [2021-11-07 01:00:41,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:00:41,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:41,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:00:41,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:00:41,533 INFO L87 Difference]: Start difference. First operand 1906 states and 2601 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:41,727 INFO L93 Difference]: Finished difference Result 4627 states and 6409 transitions. [2021-11-07 01:00:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:00:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:00:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:41,745 INFO L225 Difference]: With dead ends: 4627 [2021-11-07 01:00:41,745 INFO L226 Difference]: Without dead ends: 3202 [2021-11-07 01:00:41,747 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 01:00:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-11-07 01:00:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 3194. [2021-11-07 01:00:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3187 states have (on average 1.3702541575149043) internal successors, (4367), 3193 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states 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 01:00:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 4367 transitions. [2021-11-07 01:00:41,917 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 4367 transitions. Word has length 63 [2021-11-07 01:00:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 3194 states and 4367 transitions. [2021-11-07 01:00:41,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 4367 transitions. [2021-11-07 01:00:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:00:41,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:41,926 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] [2021-11-07 01:00:41,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:00:41,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash 55124087, now seen corresponding path program 1 times [2021-11-07 01:00:41,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:41,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864896599] [2021-11-07 01:00:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:41,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:42,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:42,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864896599] [2021-11-07 01:00:42,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864896599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:42,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:42,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:00:42,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021047255] [2021-11-07 01:00:42,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:42,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:42,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:42,046 INFO L87 Difference]: Start difference. First operand 3194 states and 4367 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:42,885 INFO L93 Difference]: Finished difference Result 7305 states and 10123 transitions. [2021-11-07 01:00:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:00:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:42,911 INFO L225 Difference]: With dead ends: 7305 [2021-11-07 01:00:42,912 INFO L226 Difference]: Without dead ends: 4597 [2021-11-07 01:00:42,916 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 01:00:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4597 states. [2021-11-07 01:00:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 4589. [2021-11-07 01:00:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4582 states have (on average 1.3731994762112614) internal successors, (6292), 4588 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states 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 01:00:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 6292 transitions. [2021-11-07 01:00:43,243 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 6292 transitions. Word has length 63 [2021-11-07 01:00:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:43,244 INFO L470 AbstractCegarLoop]: Abstraction has 4589 states and 6292 transitions. [2021-11-07 01:00:43,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 6292 transitions. [2021-11-07 01:00:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:00:43,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:43,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:43,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:00:43,250 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1411626804, now seen corresponding path program 1 times [2021-11-07 01:00:43,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:43,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384073734] [2021-11-07 01:00:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:43,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:43,324 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 01:00:43,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:43,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384073734] [2021-11-07 01:00:43,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384073734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:43,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:43,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:00:43,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612312627] [2021-11-07 01:00:43,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:43,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:43,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:43,327 INFO L87 Difference]: Start difference. First operand 4589 states and 6292 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:44,195 INFO L93 Difference]: Finished difference Result 12035 states and 16719 transitions. [2021-11-07 01:00:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:00:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:44,238 INFO L225 Difference]: With dead ends: 12035 [2021-11-07 01:00:44,238 INFO L226 Difference]: Without dead ends: 7683 [2021-11-07 01:00:44,246 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 01:00:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2021-11-07 01:00:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 7675. [2021-11-07 01:00:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7675 states, 7668 states have (on average 1.3776734480959834) internal successors, (10564), 7674 states have internal predecessors, (10564), 0 states have call successors, (0), 0 states 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 01:00:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7675 states to 7675 states and 10564 transitions. [2021-11-07 01:00:44,835 INFO L78 Accepts]: Start accepts. Automaton has 7675 states and 10564 transitions. Word has length 64 [2021-11-07 01:00:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:44,836 INFO L470 AbstractCegarLoop]: Abstraction has 7675 states and 10564 transitions. [2021-11-07 01:00:44,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7675 states and 10564 transitions. [2021-11-07 01:00:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:00:44,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:44,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:44,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:00:44,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash 257868933, now seen corresponding path program 1 times [2021-11-07 01:00:44,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:44,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037021779] [2021-11-07 01:00:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:44,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:44,897 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 01:00:44,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:44,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037021779] [2021-11-07 01:00:44,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037021779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:44,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:44,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:00:44,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511928643] [2021-11-07 01:00:44,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:00:44,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:00:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:00:44,900 INFO L87 Difference]: Start difference. First operand 7675 states and 10564 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:45,764 INFO L93 Difference]: Finished difference Result 19281 states and 26751 transitions. [2021-11-07 01:00:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:00:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:00:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:45,820 INFO L225 Difference]: With dead ends: 19281 [2021-11-07 01:00:45,820 INFO L226 Difference]: Without dead ends: 12762 [2021-11-07 01:00:45,831 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 01:00:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2021-11-07 01:00:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 12754. [2021-11-07 01:00:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12754 states, 12747 states have (on average 1.3702832038911117) internal successors, (17467), 12753 states have internal predecessors, (17467), 0 states have call successors, (0), 0 states 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 01:00:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12754 states to 12754 states and 17467 transitions. [2021-11-07 01:00:46,856 INFO L78 Accepts]: Start accepts. Automaton has 12754 states and 17467 transitions. Word has length 65 [2021-11-07 01:00:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:46,856 INFO L470 AbstractCegarLoop]: Abstraction has 12754 states and 17467 transitions. [2021-11-07 01:00:46,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12754 states and 17467 transitions. [2021-11-07 01:00:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:00:46,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:46,871 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 01:00:46,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:00:46,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash 868506865, now seen corresponding path program 1 times [2021-11-07 01:00:46,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:46,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419701911] [2021-11-07 01:00:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:46,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:47,005 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 01:00:47,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:47,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419701911] [2021-11-07 01:00:47,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419701911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:47,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:47,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:00:47,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802340303] [2021-11-07 01:00:47,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:00:47,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:47,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:00:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:00:47,008 INFO L87 Difference]: Start difference. First operand 12754 states and 17467 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:00:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:49,952 INFO L93 Difference]: Finished difference Result 47317 states and 65267 transitions. [2021-11-07 01:00:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:00:49,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:00:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:50,096 INFO L225 Difference]: With dead ends: 47317 [2021-11-07 01:00:50,096 INFO L226 Difference]: Without dead ends: 42028 [2021-11-07 01:00:50,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:00:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42028 states. [2021-11-07 01:00:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42028 to 12782. [2021-11-07 01:00:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12782 states, 12775 states have (on average 1.3700978473581213) internal successors, (17503), 12781 states have internal predecessors, (17503), 0 states have call successors, (0), 0 states 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 01:00:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12782 states to 12782 states and 17503 transitions. [2021-11-07 01:00:51,708 INFO L78 Accepts]: Start accepts. Automaton has 12782 states and 17503 transitions. Word has length 66 [2021-11-07 01:00:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:51,709 INFO L470 AbstractCegarLoop]: Abstraction has 12782 states and 17503 transitions. [2021-11-07 01:00:51,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:00:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 12782 states and 17503 transitions. [2021-11-07 01:00:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:00:51,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:51,719 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 01:00:51,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:00:51,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:51,720 INFO L85 PathProgramCache]: Analyzing trace with hash -115804627, now seen corresponding path program 1 times [2021-11-07 01:00:51,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:51,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689808382] [2021-11-07 01:00:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:51,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:51,805 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 01:00:51,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:51,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689808382] [2021-11-07 01:00:51,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689808382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:51,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:51,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:00:51,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178870786] [2021-11-07 01:00:51,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:00:51,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:00:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:00:51,808 INFO L87 Difference]: Start difference. First operand 12782 states and 17503 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:00:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:56,264 INFO L93 Difference]: Finished difference Result 51912 states and 71926 transitions. [2021-11-07 01:00:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:00:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:00:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:56,377 INFO L225 Difference]: With dead ends: 51912 [2021-11-07 01:00:56,377 INFO L226 Difference]: Without dead ends: 47066 [2021-11-07 01:00:56,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:00:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47066 states. [2021-11-07 01:00:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47066 to 12853. [2021-11-07 01:00:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12853 states, 12846 states have (on average 1.3702319788260937) internal successors, (17602), 12852 states have internal predecessors, (17602), 0 states have call successors, (0), 0 states 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 01:00:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12853 states to 12853 states and 17602 transitions. [2021-11-07 01:00:57,968 INFO L78 Accepts]: Start accepts. Automaton has 12853 states and 17602 transitions. Word has length 66 [2021-11-07 01:00:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:57,968 INFO L470 AbstractCegarLoop]: Abstraction has 12853 states and 17602 transitions. [2021-11-07 01:00:57,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:00:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12853 states and 17602 transitions. [2021-11-07 01:00:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:00:57,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:57,978 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 01:00:57,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:00:57,979 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:00:57,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash 31518793, now seen corresponding path program 1 times [2021-11-07 01:00:57,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:00:57,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586425952] [2021-11-07 01:00:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:57,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:00:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:58,062 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 01:00:58,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:00:58,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586425952] [2021-11-07 01:00:58,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586425952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:58,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:58,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:00:58,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24293082] [2021-11-07 01:00:58,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:00:58,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:00:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:00:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:00:58,065 INFO L87 Difference]: Start difference. First operand 12853 states and 17602 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:01:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:04,505 INFO L93 Difference]: Finished difference Result 66170 states and 91984 transitions. [2021-11-07 01:01:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:01:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:01:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:04,622 INFO L225 Difference]: With dead ends: 66170 [2021-11-07 01:01:04,623 INFO L226 Difference]: Without dead ends: 60886 [2021-11-07 01:01:04,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:01:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60886 states. [2021-11-07 01:01:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60886 to 12921. [2021-11-07 01:01:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12914 states have (on average 1.369831190955552) internal successors, (17690), 12920 states have internal predecessors, (17690), 0 states have call successors, (0), 0 states 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 01:01:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 17690 transitions. [2021-11-07 01:01:06,737 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 17690 transitions. Word has length 66 [2021-11-07 01:01:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 12921 states and 17690 transitions. [2021-11-07 01:01:06,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:01:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 17690 transitions. [2021-11-07 01:01:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:01:06,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:06,748 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 01:01:06,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:01:06,748 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 01:01:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1680186821, now seen corresponding path program 1 times [2021-11-07 01:01:06,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:06,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211591397] [2021-11-07 01:01:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:06,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:06,838 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 01:01:06,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:06,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211591397] [2021-11-07 01:01:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211591397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:06,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:06,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:01:06,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430465518] [2021-11-07 01:01:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:01:06,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:01:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:01:06,842 INFO L87 Difference]: Start difference. First operand 12921 states and 17690 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:01:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:14,220 INFO L93 Difference]: Finished difference Result 59577 states and 82646 transitions. [2021-11-07 01:01:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:01:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:01:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:14,300 INFO L225 Difference]: With dead ends: 59577 [2021-11-07 01:01:14,300 INFO L226 Difference]: Without dead ends: 54365 [2021-11-07 01:01:14,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:01:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-11-07 01:01:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 13084. [2021-11-07 01:01:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13084 states, 13077 states have (on average 1.3691978282480692) internal successors, (17905), 13083 states have internal predecessors, (17905), 0 states have call successors, (0), 0 states 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 01:01:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13084 states to 13084 states and 17905 transitions. [2021-11-07 01:01:16,024 INFO L78 Accepts]: Start accepts. Automaton has 13084 states and 17905 transitions. Word has length 66 [2021-11-07 01:01:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:16,025 INFO L470 AbstractCegarLoop]: Abstraction has 13084 states and 17905 transitions. [2021-11-07 01:01:16,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 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 01:01:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13084 states and 17905 transitions. [2021-11-07 01:01:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:01:16,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:16,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:16,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:01:16,034 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:01:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:16,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1923868673, now seen corresponding path program 1 times [2021-11-07 01:01:16,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:16,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485485543] [2021-11-07 01:01:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:16,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:16,167 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 01:01:16,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:16,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485485543] [2021-11-07 01:01:16,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485485543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:16,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:16,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:01:16,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700677281] [2021-11-07 01:01:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:01:16,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:01:16,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:01:16,170 INFO L87 Difference]: Start difference. First operand 13084 states and 17905 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:21,032 INFO L93 Difference]: Finished difference Result 40779 states and 56170 transitions. [2021-11-07 01:01:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:01:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:01:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:21,072 INFO L225 Difference]: With dead ends: 40779 [2021-11-07 01:01:21,072 INFO L226 Difference]: Without dead ends: 31279 [2021-11-07 01:01:21,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:01:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31279 states. [2021-11-07 01:01:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31279 to 13072. [2021-11-07 01:01:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13072 states, 13065 states have (on average 1.3686184462303865) internal successors, (17881), 13071 states have internal predecessors, (17881), 0 states have call successors, (0), 0 states 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 01:01:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13072 states to 13072 states and 17881 transitions. [2021-11-07 01:01:22,748 INFO L78 Accepts]: Start accepts. Automaton has 13072 states and 17881 transitions. Word has length 67 [2021-11-07 01:01:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:22,749 INFO L470 AbstractCegarLoop]: Abstraction has 13072 states and 17881 transitions. [2021-11-07 01:01:22,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 13072 states and 17881 transitions. [2021-11-07 01:01:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:01:22,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:22,758 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:22,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:01:22,758 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:01:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1803782915, now seen corresponding path program 1 times [2021-11-07 01:01:22,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:22,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297914201] [2021-11-07 01:01:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:22,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:22,876 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 01:01:22,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:22,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297914201] [2021-11-07 01:01:22,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297914201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:22,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:22,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:01:22,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157041032] [2021-11-07 01:01:22,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:01:22,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:01:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:01:22,879 INFO L87 Difference]: Start difference. First operand 13072 states and 17881 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:27,810 INFO L93 Difference]: Finished difference Result 38469 states and 53008 transitions. [2021-11-07 01:01:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:01:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:01:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:27,860 INFO L225 Difference]: With dead ends: 38469 [2021-11-07 01:01:27,860 INFO L226 Difference]: Without dead ends: 28953 [2021-11-07 01:01:27,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:01:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28953 states. [2021-11-07 01:01:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28953 to 13052. [2021-11-07 01:01:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13045 states have (on average 1.3682637025680338) internal successors, (17849), 13051 states have internal predecessors, (17849), 0 states have call successors, (0), 0 states 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 01:01:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 17849 transitions. [2021-11-07 01:01:29,737 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 17849 transitions. Word has length 67 [2021-11-07 01:01:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:29,737 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 17849 transitions. [2021-11-07 01:01:29,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 17849 transitions. [2021-11-07 01:01:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:01:29,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:29,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:01:29,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:01:29,748 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:01:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash -306757220, now seen corresponding path program 1 times [2021-11-07 01:01:29,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:01:29,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926713024] [2021-11-07 01:01:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:29,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:01:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:29,837 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 01:01:29,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:01:29,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926713024] [2021-11-07 01:01:29,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926713024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:29,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:29,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:01:29,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981175071] [2021-11-07 01:01:29,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:01:29,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:01:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:01:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:01:29,840 INFO L87 Difference]: Start difference. First operand 13052 states and 17849 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)