./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/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_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/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_81d3fff2-3987-44bb-9fbb-3761c9e50788/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 0d2234696348c57e259060be7fd705b6cb557422b7cc5a74e51b2a22fa3392bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:59,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:59,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:59,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:59,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:59,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:59,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:59,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:59,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:59,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:59,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:59,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:59,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:59,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:59,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:59,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:59,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:59,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:59,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:59,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:59,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:59,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:59,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:59,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:59,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:59,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:59,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:59,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:59,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:59,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:59,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:59,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:59,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:59,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:59,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:59,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:59,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:59,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:59,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:59,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:59,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:59,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:56:59,635 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:59,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:59,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:59,638 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:59,638 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:59,639 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:59,639 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:56:59,639 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:59,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:59,648 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:56:59,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:56:59,650 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:59,650 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:56:59,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:56:59,651 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:56:59,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:59,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:56:59,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:56:59,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:56:59,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:59,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:56:59,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:59,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:56:59,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:59,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:56:59,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:59,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:59,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:59,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:59,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:59,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:56:59,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:56:59,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:56:59,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:56:59,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:59,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:59,662 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d2234696348c57e259060be7fd705b6cb557422b7cc5a74e51b2a22fa3392bc [2021-11-07 01:57:00,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:57:00,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:57:00,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:57:00,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:57:00,106 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:57:00,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 01:57:00,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/data/f4b06e8db/c3a27b1e43f54985957608360c947da1/FLAG507fc8d77 [2021-11-07 01:57:00,946 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:57:00,947 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 01:57:00,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/data/f4b06e8db/c3a27b1e43f54985957608360c947da1/FLAG507fc8d77 [2021-11-07 01:57:01,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/data/f4b06e8db/c3a27b1e43f54985957608360c947da1 [2021-11-07 01:57:01,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:57:01,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:57:01,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:01,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:57:01,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:57:01,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:01" (1/1) ... [2021-11-07 01:57:01,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f4baaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:01, skipping insertion in model container [2021-11-07 01:57:01,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:01" (1/1) ... [2021-11-07 01:57:01,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:57:01,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:57:01,666 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5817,5830] [2021-11-07 01:57:01,694 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8470,8483] [2021-11-07 01:57:01,720 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11277,11290] [2021-11-07 01:57:01,742 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13832,13845] [2021-11-07 01:57:01,767 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16838,16851] [2021-11-07 01:57:01,807 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19408,19421] [2021-11-07 01:57:01,838 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22168,22181] [2021-11-07 01:57:01,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:01,897 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:57:01,953 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5817,5830] [2021-11-07 01:57:01,984 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8470,8483] [2021-11-07 01:57:02,023 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11277,11290] [2021-11-07 01:57:02,053 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13832,13845] [2021-11-07 01:57:02,081 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16838,16851] [2021-11-07 01:57:02,120 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19408,19421] [2021-11-07 01:57:02,134 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_81d3fff2-3987-44bb-9fbb-3761c9e50788/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22168,22181] [2021-11-07 01:57:02,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:57:02,187 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:57:02,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02 WrapperNode [2021-11-07 01:57:02,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:57:02,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:02,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:57:02,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:57:02,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:57:02,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:57:02,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:57:02,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:57:02,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:57:02,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:57:02,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:57:02,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:57:02,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (1/1) ... [2021-11-07 01:57:02,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:57:02,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:02,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:57:02,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:57:02,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:57:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:57:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:57:02,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:57:04,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:57:04,518 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:57:04,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:04 BoogieIcfgContainer [2021-11-07 01:57:04,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:57:04,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:57:04,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:57:04,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:57:04,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:01" (1/3) ... [2021-11-07 01:57:04,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d59b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:04, skipping insertion in model container [2021-11-07 01:57:04,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:02" (2/3) ... [2021-11-07 01:57:04,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d59b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:04, skipping insertion in model container [2021-11-07 01:57:04,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:04" (3/3) ... [2021-11-07 01:57:04,547 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-07 01:57:04,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:57:04,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 01:57:04,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:57:04,630 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 01:57:04,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 01:57:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 241 states have (on average 1.838174273858921) internal successors, (443), 248 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 01:57:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:57:04,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:04,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:04,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1557733902, now seen corresponding path program 1 times [2021-11-07 01:57:04,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:04,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904223072] [2021-11-07 01:57:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:04,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:05,149 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 01:57:05,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:05,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904223072] [2021-11-07 01:57:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904223072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:05,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:57:05,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97059172] [2021-11-07 01:57:05,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:57:05,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:57:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:05,200 INFO L87 Difference]: Start difference. First operand has 249 states, 241 states have (on average 1.838174273858921) internal successors, (443), 248 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:05,714 INFO L93 Difference]: Finished difference Result 340 states and 583 transitions. [2021-11-07 01:57:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:57:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:57:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:05,732 INFO L225 Difference]: With dead ends: 340 [2021-11-07 01:57:05,732 INFO L226 Difference]: Without dead ends: 215 [2021-11-07 01:57:05,736 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 01:57:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-07 01:57:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-07 01:57:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 208 states have (on average 1.25) internal successors, (260), 214 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 01:57:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 260 transitions. [2021-11-07 01:57:05,804 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 260 transitions. Word has length 46 [2021-11-07 01:57:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 260 transitions. [2021-11-07 01:57:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 260 transitions. [2021-11-07 01:57:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:57:05,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:05,810 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:57:05,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 902036529, now seen corresponding path program 1 times [2021-11-07 01:57:05,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:05,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597205806] [2021-11-07 01:57:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:05,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:05,989 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 01:57:05,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:05,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597205806] [2021-11-07 01:57:05,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597205806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:05,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:05,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:57:05,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8159620] [2021-11-07 01:57:05,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:57:05,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:57:05,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:05,994 INFO L87 Difference]: Start difference. First operand 215 states and 260 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:06,265 INFO L93 Difference]: Finished difference Result 268 states and 321 transitions. [2021-11-07 01:57:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:57:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:57:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:06,273 INFO L225 Difference]: With dead ends: 268 [2021-11-07 01:57:06,273 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 01:57:06,276 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 01:57:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 01:57:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-07 01:57:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.2402597402597402) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 01:57:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-11-07 01:57:06,303 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 46 [2021-11-07 01:57:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:06,304 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-11-07 01:57:06,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-11-07 01:57:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:57:06,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:06,308 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:06,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:57:06,309 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash -996423807, now seen corresponding path program 1 times [2021-11-07 01:57:06,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:06,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519237111] [2021-11-07 01:57:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:06,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:06,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:06,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519237111] [2021-11-07 01:57:06,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519237111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:06,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:06,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:57:06,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389153860] [2021-11-07 01:57:06,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:57:06,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:57:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:06,543 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:06,750 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2021-11-07 01:57:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:57:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:57:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:06,754 INFO L225 Difference]: With dead ends: 224 [2021-11-07 01:57:06,754 INFO L226 Difference]: Without dead ends: 139 [2021-11-07 01:57:06,755 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 01:57:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-07 01:57:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-07 01:57:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.2424242424242424) internal successors, (164), 138 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 01:57:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-11-07 01:57:06,772 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 46 [2021-11-07 01:57:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:06,773 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-11-07 01:57:06,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-11-07 01:57:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:57:06,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:06,776 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:57:06,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash 640925669, now seen corresponding path program 1 times [2021-11-07 01:57:06,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:06,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010959312] [2021-11-07 01:57:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:06,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:06,984 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 01:57:06,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:06,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010959312] [2021-11-07 01:57:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010959312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:06,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:06,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:06,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299248000] [2021-11-07 01:57:06,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:06,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:06,988 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:07,671 INFO L93 Difference]: Finished difference Result 269 states and 324 transitions. [2021-11-07 01:57:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:57:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:57:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:07,676 INFO L225 Difference]: With dead ends: 269 [2021-11-07 01:57:07,676 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 01:57:07,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:57:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 01:57:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 139. [2021-11-07 01:57:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 138 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 01:57:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-11-07 01:57:07,724 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 47 [2021-11-07 01:57:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:07,728 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-11-07 01:57:07,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-11-07 01:57:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:57:07,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:07,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:07,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:57:07,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1888903618, now seen corresponding path program 1 times [2021-11-07 01:57:07,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:07,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431915260] [2021-11-07 01:57:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:07,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:07,969 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 01:57:07,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:07,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431915260] [2021-11-07 01:57:07,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431915260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:07,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:07,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:07,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557926207] [2021-11-07 01:57:07,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:07,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:07,975 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:08,599 INFO L93 Difference]: Finished difference Result 313 states and 381 transitions. [2021-11-07 01:57:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:57:08,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:57:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:08,604 INFO L225 Difference]: With dead ends: 313 [2021-11-07 01:57:08,604 INFO L226 Difference]: Without dead ends: 268 [2021-11-07 01:57:08,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:57:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-07 01:57:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 139. [2021-11-07 01:57:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.2272727272727273) internal successors, (162), 138 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 162 transitions. [2021-11-07 01:57:08,626 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 162 transitions. Word has length 47 [2021-11-07 01:57:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:08,627 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 162 transitions. [2021-11-07 01:57:08,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 162 transitions. [2021-11-07 01:57:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:57:08,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:08,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:08,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:57:08,642 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash -367947433, now seen corresponding path program 1 times [2021-11-07 01:57:08,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:08,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419336633] [2021-11-07 01:57:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:08,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:08,844 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 01:57:08,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:08,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419336633] [2021-11-07 01:57:08,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419336633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:08,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:08,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:57:08,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839558601] [2021-11-07 01:57:08,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:57:08,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:57:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:57:08,860 INFO L87 Difference]: Start difference. First operand 139 states and 162 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:09,157 INFO L93 Difference]: Finished difference Result 264 states and 308 transitions. [2021-11-07 01:57:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:57:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:57:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:09,160 INFO L225 Difference]: With dead ends: 264 [2021-11-07 01:57:09,161 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 01:57:09,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 01:57:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 139. [2021-11-07 01:57:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 138 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 01:57:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2021-11-07 01:57:09,206 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 47 [2021-11-07 01:57:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:09,209 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2021-11-07 01:57:09,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2021-11-07 01:57:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:57:09,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:09,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:57:09,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash 233049586, now seen corresponding path program 1 times [2021-11-07 01:57:09,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:09,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502541458] [2021-11-07 01:57:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:09,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:09,785 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 01:57:09,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:09,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502541458] [2021-11-07 01:57:09,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502541458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:09,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:09,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 01:57:09,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171097698] [2021-11-07 01:57:09,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:57:09,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:57:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:57:09,789 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:10,942 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2021-11-07 01:57:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:57:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:57:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:10,947 INFO L225 Difference]: With dead ends: 311 [2021-11-07 01:57:10,947 INFO L226 Difference]: Without dead ends: 307 [2021-11-07 01:57:10,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:57:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-07 01:57:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 135. [2021-11-07 01:57:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 134 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 01:57:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2021-11-07 01:57:10,974 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 49 [2021-11-07 01:57:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:10,974 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2021-11-07 01:57:10,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2021-11-07 01:57:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:57:10,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:10,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:10,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:57:10,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash 80464025, now seen corresponding path program 1 times [2021-11-07 01:57:10,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:10,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239741648] [2021-11-07 01:57:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:10,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:11,499 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 01:57:11,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:11,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239741648] [2021-11-07 01:57:11,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239741648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:11,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:11,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 01:57:11,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767360927] [2021-11-07 01:57:11,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:57:11,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:57:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:57:11,502 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:12,719 INFO L93 Difference]: Finished difference Result 338 states and 394 transitions. [2021-11-07 01:57:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:57:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:57:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:12,724 INFO L225 Difference]: With dead ends: 338 [2021-11-07 01:57:12,724 INFO L226 Difference]: Without dead ends: 306 [2021-11-07 01:57:12,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:57:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-07 01:57:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 131. [2021-11-07 01:57:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 130 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 01:57:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2021-11-07 01:57:12,749 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 49 [2021-11-07 01:57:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2021-11-07 01:57:12,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2021-11-07 01:57:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:57:12,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:12,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:12,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:57:12,755 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash 94533632, now seen corresponding path program 1 times [2021-11-07 01:57:12,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:12,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909054582] [2021-11-07 01:57:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:12,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:13,498 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 01:57:13,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:13,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909054582] [2021-11-07 01:57:13,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909054582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:13,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-07 01:57:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460088310] [2021-11-07 01:57:13,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:57:13,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:57:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:57:13,502 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:15,868 INFO L93 Difference]: Finished difference Result 426 states and 516 transitions. [2021-11-07 01:57:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:57:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:57:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:15,873 INFO L225 Difference]: With dead ends: 426 [2021-11-07 01:57:15,873 INFO L226 Difference]: Without dead ends: 420 [2021-11-07 01:57:15,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 01:57:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-07 01:57:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 131. [2021-11-07 01:57:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 130 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 01:57:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2021-11-07 01:57:15,901 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 49 [2021-11-07 01:57:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:15,902 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2021-11-07 01:57:15,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2021-11-07 01:57:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:57:15,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:15,904 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:15,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:57:15,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:15,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash 128300745, now seen corresponding path program 1 times [2021-11-07 01:57:15,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:15,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225449278] [2021-11-07 01:57:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:15,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:16,348 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 01:57:16,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:16,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225449278] [2021-11-07 01:57:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225449278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:16,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:16,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:57:16,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192029572] [2021-11-07 01:57:16,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:16,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:16,352 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:17,167 INFO L93 Difference]: Finished difference Result 238 states and 283 transitions. [2021-11-07 01:57:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:57:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:57:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:17,170 INFO L225 Difference]: With dead ends: 238 [2021-11-07 01:57:17,170 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 01:57:17,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:57:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 01:57:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-11-07 01:57:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 119 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:57:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2021-11-07 01:57:17,195 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 49 [2021-11-07 01:57:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2021-11-07 01:57:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2021-11-07 01:57:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:57:17,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:17,198 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] [2021-11-07 01:57:17,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:57:17,199 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1905877059, now seen corresponding path program 1 times [2021-11-07 01:57:17,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:17,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629040689] [2021-11-07 01:57:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:17,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:17,343 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 01:57:17,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:17,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629040689] [2021-11-07 01:57:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629040689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:17,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:17,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:17,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830283535] [2021-11-07 01:57:17,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:17,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:17,349 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:17,810 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2021-11-07 01:57:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:57:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:57:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:17,812 INFO L225 Difference]: With dead ends: 190 [2021-11-07 01:57:17,813 INFO L226 Difference]: Without dead ends: 183 [2021-11-07 01:57:17,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-07 01:57:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2021-11-07 01:57:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.1896551724137931) internal successors, (138), 119 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 01:57:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2021-11-07 01:57:17,838 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 50 [2021-11-07 01:57:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:17,838 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2021-11-07 01:57:17,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2021-11-07 01:57:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:57:17,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:17,840 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] [2021-11-07 01:57:17,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:57:17,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash 56983254, now seen corresponding path program 1 times [2021-11-07 01:57:17,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:17,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786896274] [2021-11-07 01:57:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:17,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:17,955 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 01:57:17,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:17,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786896274] [2021-11-07 01:57:17,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786896274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:17,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:17,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:17,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139182269] [2021-11-07 01:57:17,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:17,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:17,959 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:18,423 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2021-11-07 01:57:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:57:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:57:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:18,429 INFO L225 Difference]: With dead ends: 233 [2021-11-07 01:57:18,429 INFO L226 Difference]: Without dead ends: 187 [2021-11-07 01:57:18,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:57:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-07 01:57:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2021-11-07 01:57:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 119 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 01:57:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2021-11-07 01:57:18,455 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 50 [2021-11-07 01:57:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:18,456 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2021-11-07 01:57:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2021-11-07 01:57:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:57:18,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:18,458 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] [2021-11-07 01:57:18,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:57:18,458 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1453558129, now seen corresponding path program 1 times [2021-11-07 01:57:18,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:18,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269903406] [2021-11-07 01:57:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:18,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:18,582 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 01:57:18,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:18,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269903406] [2021-11-07 01:57:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269903406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:18,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:18,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:18,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777791638] [2021-11-07 01:57:18,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:18,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:18,585 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:19,069 INFO L93 Difference]: Finished difference Result 190 states and 218 transitions. [2021-11-07 01:57:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:57:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:57:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:19,073 INFO L225 Difference]: With dead ends: 190 [2021-11-07 01:57:19,073 INFO L226 Difference]: Without dead ends: 183 [2021-11-07 01:57:19,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-07 01:57:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2021-11-07 01:57:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 119 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 01:57:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-11-07 01:57:19,103 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 50 [2021-11-07 01:57:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:19,103 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-11-07 01:57:19,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-11-07 01:57:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:57:19,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:19,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:19,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:57:19,106 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash -893080879, now seen corresponding path program 1 times [2021-11-07 01:57:19,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:19,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869798077] [2021-11-07 01:57:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:19,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:19,647 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 01:57:19,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:19,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869798077] [2021-11-07 01:57:19,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869798077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:19,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:19,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:57:19,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050487048] [2021-11-07 01:57:19,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:57:19,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:57:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:19,652 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:21,161 INFO L93 Difference]: Finished difference Result 441 states and 526 transitions. [2021-11-07 01:57:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:57:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:57:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:21,166 INFO L225 Difference]: With dead ends: 441 [2021-11-07 01:57:21,166 INFO L226 Difference]: Without dead ends: 435 [2021-11-07 01:57:21,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:57:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-07 01:57:21,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 131. [2021-11-07 01:57:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 130 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 01:57:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-11-07 01:57:21,201 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 52 [2021-11-07 01:57:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:21,201 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-11-07 01:57:21,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-11-07 01:57:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:57:21,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:21,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:21,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:57:21,203 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1860561272, now seen corresponding path program 1 times [2021-11-07 01:57:21,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:21,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807346984] [2021-11-07 01:57:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:21,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:21,586 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 01:57:21,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:21,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807346984] [2021-11-07 01:57:21,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807346984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:21,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:21,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:57:21,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810632661] [2021-11-07 01:57:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:57:21,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:57:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:57:21,588 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:22,722 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2021-11-07 01:57:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:57:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:57:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:22,726 INFO L225 Difference]: With dead ends: 311 [2021-11-07 01:57:22,726 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 01:57:22,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:57:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 01:57:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 135. [2021-11-07 01:57:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.183206106870229) internal successors, (155), 134 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 01:57:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2021-11-07 01:57:22,763 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 52 [2021-11-07 01:57:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:22,764 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2021-11-07 01:57:22,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2021-11-07 01:57:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:57:22,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:22,765 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:22,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:57:22,766 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1147357962, now seen corresponding path program 1 times [2021-11-07 01:57:22,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:22,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907132391] [2021-11-07 01:57:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:22,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:23,312 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 01:57:23,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:23,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907132391] [2021-11-07 01:57:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907132391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:23,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:23,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:57:23,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460387382] [2021-11-07 01:57:23,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:57:23,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:23,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:57:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:23,315 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:25,008 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2021-11-07 01:57:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:57:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:57:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:25,011 INFO L225 Difference]: With dead ends: 311 [2021-11-07 01:57:25,012 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 01:57:25,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:57:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 01:57:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 140. [2021-11-07 01:57:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 01:57:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2021-11-07 01:57:25,050 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 52 [2021-11-07 01:57:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:25,051 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2021-11-07 01:57:25,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2021-11-07 01:57:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:57:25,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:25,052 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] [2021-11-07 01:57:25,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:57:25,053 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:25,054 INFO L85 PathProgramCache]: Analyzing trace with hash -208243913, now seen corresponding path program 1 times [2021-11-07 01:57:25,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:25,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87373846] [2021-11-07 01:57:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:25,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:25,718 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 01:57:25,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:25,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87373846] [2021-11-07 01:57:25,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87373846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:25,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:25,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-07 01:57:25,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109281904] [2021-11-07 01:57:25,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:57:25,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:57:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:57:25,721 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:27,767 INFO L93 Difference]: Finished difference Result 453 states and 546 transitions. [2021-11-07 01:57:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:57:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:27,771 INFO L225 Difference]: With dead ends: 453 [2021-11-07 01:57:27,771 INFO L226 Difference]: Without dead ends: 447 [2021-11-07 01:57:27,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:57:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-07 01:57:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 140. [2021-11-07 01:57:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 01:57:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2021-11-07 01:57:27,805 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 53 [2021-11-07 01:57:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:27,805 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2021-11-07 01:57:27,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2021-11-07 01:57:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:57:27,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:27,806 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] [2021-11-07 01:57:27,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:57:27,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1572967529, now seen corresponding path program 1 times [2021-11-07 01:57:27,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:27,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666903433] [2021-11-07 01:57:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:27,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:28,555 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 01:57:28,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:28,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666903433] [2021-11-07 01:57:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666903433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:28,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:28,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:57:28,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338348188] [2021-11-07 01:57:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:57:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:57:28,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:57:28,558 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:30,632 INFO L93 Difference]: Finished difference Result 320 states and 375 transitions. [2021-11-07 01:57:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:57:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:30,635 INFO L225 Difference]: With dead ends: 320 [2021-11-07 01:57:30,636 INFO L226 Difference]: Without dead ends: 308 [2021-11-07 01:57:30,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=1047, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 01:57:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-07 01:57:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 136. [2021-11-07 01:57:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 135 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 01:57:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2021-11-07 01:57:30,689 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 53 [2021-11-07 01:57:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:30,689 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2021-11-07 01:57:30,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2021-11-07 01:57:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:57:30,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:30,691 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] [2021-11-07 01:57:30,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:57:30,692 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash 261826057, now seen corresponding path program 1 times [2021-11-07 01:57:30,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:30,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202110158] [2021-11-07 01:57:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:30,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:31,068 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 01:57:31,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:31,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202110158] [2021-11-07 01:57:31,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202110158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:31,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:31,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 01:57:31,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865978762] [2021-11-07 01:57:31,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:31,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:31,071 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:32,167 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2021-11-07 01:57:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:57:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:32,170 INFO L225 Difference]: With dead ends: 262 [2021-11-07 01:57:32,170 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 01:57:32,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:57:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 01:57:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 124. [2021-11-07 01:57:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 123 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 01:57:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2021-11-07 01:57:32,212 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 53 [2021-11-07 01:57:32,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:32,212 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2021-11-07 01:57:32,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2021-11-07 01:57:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:57:32,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:32,214 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] [2021-11-07 01:57:32,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:57:32,215 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1279499088, now seen corresponding path program 1 times [2021-11-07 01:57:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:32,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526813151] [2021-11-07 01:57:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:32,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:32,792 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 01:57:32,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:32,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526813151] [2021-11-07 01:57:32,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526813151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:32,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:32,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-07 01:57:32,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585563054] [2021-11-07 01:57:32,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:57:32,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:57:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:57:32,795 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:33,784 INFO L93 Difference]: Finished difference Result 249 states and 295 transitions. [2021-11-07 01:57:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:57:33,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:33,786 INFO L225 Difference]: With dead ends: 249 [2021-11-07 01:57:33,787 INFO L226 Difference]: Without dead ends: 238 [2021-11-07 01:57:33,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:57:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-07 01:57:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-11-07 01:57:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.161904761904762) internal successors, (122), 106 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 01:57:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-11-07 01:57:33,828 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 53 [2021-11-07 01:57:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:33,828 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-11-07 01:57:33,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-11-07 01:57:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:57:33,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:33,830 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] [2021-11-07 01:57:33,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:57:33,830 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1319929634, now seen corresponding path program 1 times [2021-11-07 01:57:33,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:33,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547866107] [2021-11-07 01:57:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:33,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:34,374 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 01:57:34,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:34,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547866107] [2021-11-07 01:57:34,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547866107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:34,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:34,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 01:57:34,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296836478] [2021-11-07 01:57:34,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:57:34,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:57:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:57:34,377 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:35,598 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2021-11-07 01:57:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:57:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:35,601 INFO L225 Difference]: With dead ends: 206 [2021-11-07 01:57:35,601 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 01:57:35,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:57:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 01:57:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 102. [2021-11-07 01:57:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.16) internal successors, (116), 101 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 01:57:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-11-07 01:57:35,644 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 53 [2021-11-07 01:57:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:35,644 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-11-07 01:57:35,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-11-07 01:57:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:57:35,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:35,646 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] [2021-11-07 01:57:35,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:57:35,646 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2028219561, now seen corresponding path program 1 times [2021-11-07 01:57:35,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:35,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899861577] [2021-11-07 01:57:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:35,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:35,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899861577] [2021-11-07 01:57:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899861577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:35,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:35,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:57:35,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993781103] [2021-11-07 01:57:35,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:57:36,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:57:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:57:36,001 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:36,709 INFO L93 Difference]: Finished difference Result 275 states and 337 transitions. [2021-11-07 01:57:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:57:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:57:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:36,717 INFO L225 Difference]: With dead ends: 275 [2021-11-07 01:57:36,717 INFO L226 Difference]: Without dead ends: 257 [2021-11-07 01:57:36,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:57:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-07 01:57:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 84. [2021-11-07 01:57:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 01:57:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-07 01:57:36,764 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 53 [2021-11-07 01:57:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:36,765 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-07 01:57:36,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-07 01:57:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:57:36,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:36,767 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 01:57:36,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:57:36,767 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1177708898, now seen corresponding path program 1 times [2021-11-07 01:57:36,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:36,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100967710] [2021-11-07 01:57:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:36,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:36,822 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 01:57:36,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:36,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100967710] [2021-11-07 01:57:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100967710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:36,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:57:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696732557] [2021-11-07 01:57:36,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:36,829 INFO L87 Difference]: Start difference. First operand 84 states and 97 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 01:57:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:36,907 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2021-11-07 01:57:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:36,908 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 01:57:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:36,909 INFO L225 Difference]: With dead ends: 140 [2021-11-07 01:57:36,910 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 01:57:36,910 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 01:57:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 01:57:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2021-11-07 01:57:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 105 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 01:57:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2021-11-07 01:57:36,972 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 63 [2021-11-07 01:57:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:36,972 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2021-11-07 01:57:36,973 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 01:57:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2021-11-07 01:57:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:57:36,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:36,974 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 01:57:36,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:57:36,974 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:36,975 INFO L85 PathProgramCache]: Analyzing trace with hash 625150511, now seen corresponding path program 1 times [2021-11-07 01:57:36,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:36,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522989586] [2021-11-07 01:57:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:36,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:37,042 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 01:57:37,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:37,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522989586] [2021-11-07 01:57:37,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522989586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:37,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:37,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:57:37,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642054683] [2021-11-07 01:57:37,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:37,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:37,045 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:37,169 INFO L93 Difference]: Finished difference Result 206 states and 261 transitions. [2021-11-07 01:57:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:57:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:37,172 INFO L225 Difference]: With dead ends: 206 [2021-11-07 01:57:37,172 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 01:57:37,172 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 01:57:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 01:57:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-11-07 01:57:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 145 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2021-11-07 01:57:37,274 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 66 [2021-11-07 01:57:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:37,275 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2021-11-07 01:57:37,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2021-11-07 01:57:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:57:37,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:37,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:37,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:57:37,277 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2007774559, now seen corresponding path program 1 times [2021-11-07 01:57:37,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:37,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504356412] [2021-11-07 01:57:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:37,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:37,340 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 01:57:37,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:37,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504356412] [2021-11-07 01:57:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504356412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:37,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:37,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:57:37,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215919885] [2021-11-07 01:57:37,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:37,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:37,348 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:37,554 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2021-11-07 01:57:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:37,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:57:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:37,557 INFO L225 Difference]: With dead ends: 326 [2021-11-07 01:57:37,557 INFO L226 Difference]: Without dead ends: 236 [2021-11-07 01:57:37,558 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 01:57:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-07 01:57:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-11-07 01:57:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.2764976958525345) internal successors, (277), 217 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 01:57:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 277 transitions. [2021-11-07 01:57:37,735 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 277 transitions. Word has length 69 [2021-11-07 01:57:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:37,736 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 277 transitions. [2021-11-07 01:57:37,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 277 transitions. [2021-11-07 01:57:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:57:37,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:37,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:37,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:57:37,738 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -346947252, now seen corresponding path program 1 times [2021-11-07 01:57:37,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:37,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204456847] [2021-11-07 01:57:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:37,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:37,809 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 01:57:37,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:37,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204456847] [2021-11-07 01:57:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204456847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:37,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:37,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:57:37,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393958669] [2021-11-07 01:57:37,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:57:37,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:57:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:37,819 INFO L87 Difference]: Start difference. First operand 218 states and 277 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:38,507 INFO L93 Difference]: Finished difference Result 738 states and 959 transitions. [2021-11-07 01:57:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:57:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:38,513 INFO L225 Difference]: With dead ends: 738 [2021-11-07 01:57:38,514 INFO L226 Difference]: Without dead ends: 576 [2021-11-07 01:57:38,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-07 01:57:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-11-07 01:57:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.2718446601941749) internal successors, (393), 309 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 01:57:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 393 transitions. [2021-11-07 01:57:38,805 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 393 transitions. Word has length 72 [2021-11-07 01:57:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 393 transitions. [2021-11-07 01:57:38,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 393 transitions. [2021-11-07 01:57:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:57:38,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:38,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:38,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:57:38,807 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1090378468, now seen corresponding path program 1 times [2021-11-07 01:57:38,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:38,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694818810] [2021-11-07 01:57:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:38,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:38,925 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 01:57:38,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:38,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694818810] [2021-11-07 01:57:38,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694818810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:38,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:38,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:57:38,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270805942] [2021-11-07 01:57:38,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:57:38,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:57:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:38,929 INFO L87 Difference]: Start difference. First operand 310 states and 393 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:39,306 INFO L93 Difference]: Finished difference Result 566 states and 727 transitions. [2021-11-07 01:57:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:57:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:57:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:39,310 INFO L225 Difference]: With dead ends: 566 [2021-11-07 01:57:39,310 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 01:57:39,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 01:57:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2021-11-07 01:57:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.2686084142394822) internal successors, (392), 309 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 01:57:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 392 transitions. [2021-11-07 01:57:39,614 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 392 transitions. Word has length 74 [2021-11-07 01:57:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:39,615 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 392 transitions. [2021-11-07 01:57:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 392 transitions. [2021-11-07 01:57:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:57:39,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:39,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:57:39,617 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1159642543, now seen corresponding path program 1 times [2021-11-07 01:57:39,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:39,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595967614] [2021-11-07 01:57:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:39,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:39,679 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 01:57:39,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:39,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595967614] [2021-11-07 01:57:39,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595967614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:39,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:39,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:57:39,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064853990] [2021-11-07 01:57:39,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:39,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:39,682 INFO L87 Difference]: Start difference. First operand 310 states and 392 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:40,137 INFO L93 Difference]: Finished difference Result 666 states and 857 transitions. [2021-11-07 01:57:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:57:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:40,141 INFO L225 Difference]: With dead ends: 666 [2021-11-07 01:57:40,142 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:57:40,143 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 01:57:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:57:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2021-11-07 01:57:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.2689486552567237) internal successors, (519), 409 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 01:57:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 519 transitions. [2021-11-07 01:57:40,605 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 519 transitions. Word has length 74 [2021-11-07 01:57:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:40,605 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 519 transitions. [2021-11-07 01:57:40,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 519 transitions. [2021-11-07 01:57:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:57:40,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:40,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:40,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 01:57:40,608 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -810457545, now seen corresponding path program 1 times [2021-11-07 01:57:40,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:40,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011459586] [2021-11-07 01:57:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:40,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:40,733 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 01:57:40,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:40,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011459586] [2021-11-07 01:57:40,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011459586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:40,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:40,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:40,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886005258] [2021-11-07 01:57:40,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:57:40,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:40,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:57:40,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:57:40,736 INFO L87 Difference]: Start difference. First operand 410 states and 519 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:41,485 INFO L93 Difference]: Finished difference Result 556 states and 694 transitions. [2021-11-07 01:57:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:57:41,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:57:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:41,491 INFO L225 Difference]: With dead ends: 556 [2021-11-07 01:57:41,492 INFO L226 Difference]: Without dead ends: 554 [2021-11-07 01:57:41,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:57:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-07 01:57:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 410. [2021-11-07 01:57:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.2493887530562346) internal successors, (511), 409 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 01:57:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 511 transitions. [2021-11-07 01:57:41,880 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 511 transitions. Word has length 75 [2021-11-07 01:57:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:41,881 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 511 transitions. [2021-11-07 01:57:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 511 transitions. [2021-11-07 01:57:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:57:41,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:41,884 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:41,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 01:57:41,884 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:41,885 INFO L85 PathProgramCache]: Analyzing trace with hash -333797144, now seen corresponding path program 1 times [2021-11-07 01:57:41,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:41,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050759473] [2021-11-07 01:57:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:42,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:42,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050759473] [2021-11-07 01:57:42,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050759473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:42,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:42,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:57:42,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411738207] [2021-11-07 01:57:42,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:42,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:42,052 INFO L87 Difference]: Start difference. First operand 410 states and 511 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:43,110 INFO L93 Difference]: Finished difference Result 1007 states and 1265 transitions. [2021-11-07 01:57:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:57:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:57:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:43,116 INFO L225 Difference]: With dead ends: 1007 [2021-11-07 01:57:43,116 INFO L226 Difference]: Without dead ends: 647 [2021-11-07 01:57:43,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:57:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-07 01:57:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 410. [2021-11-07 01:57:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.2469437652811737) internal successors, (510), 409 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 01:57:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 510 transitions. [2021-11-07 01:57:43,472 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 510 transitions. Word has length 86 [2021-11-07 01:57:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 510 transitions. [2021-11-07 01:57:43,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 510 transitions. [2021-11-07 01:57:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:57:43,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:43,474 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:43,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 01:57:43,475 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:43,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:43,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1816896019, now seen corresponding path program 1 times [2021-11-07 01:57:43,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:43,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397931490] [2021-11-07 01:57:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:43,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:44,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:44,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397931490] [2021-11-07 01:57:44,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397931490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:44,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:44,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-07 01:57:44,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448871113] [2021-11-07 01:57:44,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:57:44,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:57:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:57:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:57:44,006 INFO L87 Difference]: Start difference. First operand 410 states and 510 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 01:57:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:45,865 INFO L93 Difference]: Finished difference Result 1473 states and 1846 transitions. [2021-11-07 01:57:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:57:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 88 [2021-11-07 01:57:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:45,872 INFO L225 Difference]: With dead ends: 1473 [2021-11-07 01:57:45,872 INFO L226 Difference]: Without dead ends: 1112 [2021-11-07 01:57:45,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:57:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-11-07 01:57:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 420. [2021-11-07 01:57:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.243436754176611) internal successors, (521), 419 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 01:57:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 521 transitions. [2021-11-07 01:57:46,308 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 521 transitions. Word has length 88 [2021-11-07 01:57:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:46,309 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 521 transitions. [2021-11-07 01:57:46,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 01:57:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 521 transitions. [2021-11-07 01:57:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:57:46,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:46,311 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:46,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 01:57:46,312 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:57:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:46,312 INFO L85 PathProgramCache]: Analyzing trace with hash -508841667, now seen corresponding path program 1 times [2021-11-07 01:57:46,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:57:46,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855983647] [2021-11-07 01:57:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:46,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:57:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:48,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:57:48,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855983647] [2021-11-07 01:57:48,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855983647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:57:48,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955177392] [2021-11-07 01:57:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:48,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:57:48,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:48,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:57:48,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3fff2-3987-44bb-9fbb-3761c9e50788/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:57:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:48,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 01:57:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:58,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:57,426 WARN L207 SmtUtils]: Spent 26.44 s on a formula simplification that was a NOOP. DAG size: 186 [2021-11-07 02:07:54,028 WARN L207 SmtUtils]: Spent 1.15 m on a formula simplification that was a NOOP. DAG size: 198 [2021-11-07 02:09:21,443 WARN L207 SmtUtils]: Spent 1.20 m on a formula simplification that was a NOOP. DAG size: 188 [2021-11-07 02:10:36,929 WARN L207 SmtUtils]: Spent 1.09 m on a formula simplification that was a NOOP. DAG size: 190