./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI --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 0ffe39e5069596e29b504492c7e6b50a86ab43c69c1a6acd2a45f3ed316ecfd7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:50:58,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:50:58,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:50:58,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:50:58,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:50:58,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:50:58,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:50:58,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:50:58,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:50:58,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:50:58,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:50:58,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:50:58,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:50:58,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:50:58,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:50:58,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:50:58,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:50:58,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:50:58,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:50:58,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:50:58,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:50:58,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:50:58,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:50:58,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:50:58,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:50:58,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:50:58,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:50:58,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:50:58,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:50:58,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:50:58,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:50:58,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:50:58,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:50:58,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:50:58,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:50:58,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:50:58,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:50:58,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:50:58,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:50:58,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:50:58,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:50:58,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:50:58,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:50:58,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:50:58,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:50:58,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:50:58,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:50:58,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:50:58,696 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:50:58,697 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:50:58,697 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:50:58,697 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:50:58,698 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:50:58,698 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:50:58,698 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:50:58,699 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:50:58,699 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:50:58,699 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:50:58,699 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:50:58,700 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:50:58,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:50:58,700 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:50:58,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:50:58,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:50:58,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:50:58,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:50:58,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:50:58,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:50:58,703 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:50:58,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:50:58,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:50:58,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:50:58,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:50:58,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:50:58,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:58,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:50:58,705 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:50:58,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:50:58,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:50:58,706 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:50:58,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:50:58,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:50:58,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:50:58,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ffe39e5069596e29b504492c7e6b50a86ab43c69c1a6acd2a45f3ed316ecfd7 [2022-11-03 02:50:58,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:50:58,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:50:58,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:50:58,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:50:58,974 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:50:58,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-11-03 02:50:59,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/data/68c67ff1d/65bbc28af9804a12906190a983bd2c7f/FLAG13367fe9d [2022-11-03 02:50:59,567 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:50:59,568 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-11-03 02:50:59,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/data/68c67ff1d/65bbc28af9804a12906190a983bd2c7f/FLAG13367fe9d [2022-11-03 02:50:59,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/data/68c67ff1d/65bbc28af9804a12906190a983bd2c7f [2022-11-03 02:50:59,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:50:59,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:50:59,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:59,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:50:59,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:50:59,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:59" (1/1) ... [2022-11-03 02:50:59,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398f9e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:59, skipping insertion in model container [2022-11-03 02:50:59,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:59" (1/1) ... [2022-11-03 02:50:59,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:50:59,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:51:00,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15966,15979] [2022-11-03 02:51:00,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:51:00,412 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:51:00,569 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15966,15979] [2022-11-03 02:51:00,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:51:00,643 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:51:00,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00 WrapperNode [2022-11-03 02:51:00,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:51:00,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:51:00,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:51:00,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:51:00,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,753 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1294 [2022-11-03 02:51:00,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:51:00,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:51:00,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:51:00,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:51:00,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:51:00,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:51:00,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:51:00,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:51:00,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (1/1) ... [2022-11-03 02:51:00,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:51:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:00,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:51:00,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db914acb-5900-453d-99fc-05af00415f25/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:51:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:51:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:51:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:51:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:51:01,033 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:51:01,035 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:51:02,417 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:51:02,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:51:02,859 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:51:02,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:02 BoogieIcfgContainer [2022-11-03 02:51:02,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:51:02,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:51:02,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:51:02,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:51:02,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:50:59" (1/3) ... [2022-11-03 02:51:02,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eba923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:51:02, skipping insertion in model container [2022-11-03 02:51:02,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:00" (2/3) ... [2022-11-03 02:51:02,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eba923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:51:02, skipping insertion in model container [2022-11-03 02:51:02,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:51:02" (3/3) ... [2022-11-03 02:51:02,878 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-11-03 02:51:02,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:51:02,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:51:02,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:51:02,999 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d46db57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:51:03,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:51:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 247 states have (on average 1.777327935222672) internal successors, (439), 248 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:51:03,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:03,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:03,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1108360375, now seen corresponding path program 1 times [2022-11-03 02:51:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:03,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481706551] [2022-11-03 02:51:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:04,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481706551] [2022-11-03 02:51:04,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481706551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:04,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:04,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:04,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536613842] [2022-11-03 02:51:04,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:04,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:04,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:05,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:05,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:05,019 INFO L87 Difference]: Start difference. First operand has 249 states, 247 states have (on average 1.777327935222672) internal successors, (439), 248 states have internal predecessors, (439), 0 states have call successors, (0), 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 23.2) internal successors, (116), 4 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) [2022-11-03 02:51:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:05,393 INFO L93 Difference]: Finished difference Result 616 states and 1076 transitions. [2022-11-03 02:51:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 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) Word has length 116 [2022-11-03 02:51:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:05,415 INFO L225 Difference]: With dead ends: 616 [2022-11-03 02:51:05,422 INFO L226 Difference]: Without dead ends: 438 [2022-11-03 02:51:05,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:05,435 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1101 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:05,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 796 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:51:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-03 02:51:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2022-11-03 02:51:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.3908045977011494) internal successors, (605), 435 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 605 transitions. [2022-11-03 02:51:05,578 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 605 transitions. Word has length 116 [2022-11-03 02:51:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:05,579 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 605 transitions. [2022-11-03 02:51:05,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 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) [2022-11-03 02:51:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 605 transitions. [2022-11-03 02:51:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 02:51:05,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:05,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:05,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:51:05,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1634265249, now seen corresponding path program 1 times [2022-11-03 02:51:05,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:05,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989851067] [2022-11-03 02:51:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:05,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:05,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989851067] [2022-11-03 02:51:05,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989851067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:05,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:05,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:05,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97614984] [2022-11-03 02:51:05,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:05,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:05,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:05,767 INFO L87 Difference]: Start difference. First operand 436 states and 605 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:06,001 INFO L93 Difference]: Finished difference Result 921 states and 1296 transitions. [2022-11-03 02:51:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-11-03 02:51:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:06,006 INFO L225 Difference]: With dead ends: 921 [2022-11-03 02:51:06,006 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 02:51:06,008 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:06,010 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 200 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:06,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 626 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 02:51:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 548. [2022-11-03 02:51:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.43327239488117) internal successors, (784), 547 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 784 transitions. [2022-11-03 02:51:06,085 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 784 transitions. Word has length 118 [2022-11-03 02:51:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,085 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 784 transitions. [2022-11-03 02:51:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 784 transitions. [2022-11-03 02:51:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 02:51:06,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:06,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:51:06,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash 974330824, now seen corresponding path program 1 times [2022-11-03 02:51:06,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:06,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852782529] [2022-11-03 02:51:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:06,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:06,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:06,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852782529] [2022-11-03 02:51:06,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852782529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:06,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:06,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:06,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592245631] [2022-11-03 02:51:06,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:06,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:06,286 INFO L87 Difference]: Start difference. First operand 548 states and 784 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:06,509 INFO L93 Difference]: Finished difference Result 1339 states and 1966 transitions. [2022-11-03 02:51:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-11-03 02:51:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:06,516 INFO L225 Difference]: With dead ends: 1339 [2022-11-03 02:51:06,516 INFO L226 Difference]: Without dead ends: 838 [2022-11-03 02:51:06,518 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:06,524 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 247 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:06,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 670 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-11-03 02:51:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 750. [2022-11-03 02:51:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.479305740987984) internal successors, (1108), 749 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1108 transitions. [2022-11-03 02:51:06,619 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1108 transitions. Word has length 118 [2022-11-03 02:51:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,621 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1108 transitions. [2022-11-03 02:51:06,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1108 transitions. [2022-11-03 02:51:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:51:06,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:51:06,624 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2009090797, now seen corresponding path program 1 times [2022-11-03 02:51:06,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:06,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90711774] [2022-11-03 02:51:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:06,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:06,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90711774] [2022-11-03 02:51:06,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90711774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:06,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:06,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:06,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967598057] [2022-11-03 02:51:06,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:06,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:06,871 INFO L87 Difference]: Start difference. First operand 750 states and 1108 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:07,171 INFO L93 Difference]: Finished difference Result 1403 states and 2088 transitions. [2022-11-03 02:51:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2022-11-03 02:51:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:07,175 INFO L225 Difference]: With dead ends: 1403 [2022-11-03 02:51:07,175 INFO L226 Difference]: Without dead ends: 750 [2022-11-03 02:51:07,176 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:07,187 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 906 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:07,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 262 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-03 02:51:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-03 02:51:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.4632843791722296) internal successors, (1096), 749 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1096 transitions. [2022-11-03 02:51:07,350 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1096 transitions. Word has length 121 [2022-11-03 02:51:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:07,351 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1096 transitions. [2022-11-03 02:51:07,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1096 transitions. [2022-11-03 02:51:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:51:07,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:07,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:07,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:51:07,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash 370744200, now seen corresponding path program 1 times [2022-11-03 02:51:07,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:07,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982120422] [2022-11-03 02:51:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:07,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:08,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982120422] [2022-11-03 02:51:08,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982120422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:08,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:08,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:08,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026529143] [2022-11-03 02:51:08,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:08,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:08,429 INFO L87 Difference]: Start difference. First operand 750 states and 1096 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:08,856 INFO L93 Difference]: Finished difference Result 2054 states and 3022 transitions. [2022-11-03 02:51:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2022-11-03 02:51:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:08,862 INFO L225 Difference]: With dead ends: 2054 [2022-11-03 02:51:08,863 INFO L226 Difference]: Without dead ends: 1387 [2022-11-03 02:51:08,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:08,864 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 1378 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:08,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 582 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:08,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-11-03 02:51:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1385. [2022-11-03 02:51:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 1.4602601156069364) internal successors, (2021), 1384 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2021 transitions. [2022-11-03 02:51:09,120 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2021 transitions. Word has length 121 [2022-11-03 02:51:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:09,120 INFO L495 AbstractCegarLoop]: Abstraction has 1385 states and 2021 transitions. [2022-11-03 02:51:09,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2021 transitions. [2022-11-03 02:51:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:51:09,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:09,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:09,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:51:09,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 358492424, now seen corresponding path program 1 times [2022-11-03 02:51:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:09,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284125858] [2022-11-03 02:51:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:09,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:09,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:09,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284125858] [2022-11-03 02:51:09,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284125858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:09,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:09,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:09,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841568129] [2022-11-03 02:51:09,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:09,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:09,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:09,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:09,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:09,237 INFO L87 Difference]: Start difference. First operand 1385 states and 2021 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:09,757 INFO L93 Difference]: Finished difference Result 3529 states and 5247 transitions. [2022-11-03 02:51:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2022-11-03 02:51:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:09,767 INFO L225 Difference]: With dead ends: 3529 [2022-11-03 02:51:09,768 INFO L226 Difference]: Without dead ends: 2233 [2022-11-03 02:51:09,769 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:09,771 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 214 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:09,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 631 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-11-03 02:51:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2111. [2022-11-03 02:51:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 1.500947867298578) internal successors, (3167), 2110 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3167 transitions. [2022-11-03 02:51:10,214 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3167 transitions. Word has length 123 [2022-11-03 02:51:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:10,215 INFO L495 AbstractCegarLoop]: Abstraction has 2111 states and 3167 transitions. [2022-11-03 02:51:10,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3167 transitions. [2022-11-03 02:51:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:51:10,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:10,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:10,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:51:10,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash 280777176, now seen corresponding path program 1 times [2022-11-03 02:51:10,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:10,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486782685] [2022-11-03 02:51:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:10,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:10,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:10,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486782685] [2022-11-03 02:51:10,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486782685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:10,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:10,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:10,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453618580] [2022-11-03 02:51:10,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:10,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:10,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:10,444 INFO L87 Difference]: Start difference. First operand 2111 states and 3167 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:10,978 INFO L93 Difference]: Finished difference Result 4141 states and 6232 transitions. [2022-11-03 02:51:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:10,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-11-03 02:51:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:10,986 INFO L225 Difference]: With dead ends: 4141 [2022-11-03 02:51:10,986 INFO L226 Difference]: Without dead ends: 2111 [2022-11-03 02:51:10,989 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:10,989 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 889 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:10,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 258 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-11-03 02:51:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 2111. [2022-11-03 02:51:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 1.4838862559241706) internal successors, (3131), 2110 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3131 transitions. [2022-11-03 02:51:11,325 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3131 transitions. Word has length 126 [2022-11-03 02:51:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:11,325 INFO L495 AbstractCegarLoop]: Abstraction has 2111 states and 3131 transitions. [2022-11-03 02:51:11,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3131 transitions. [2022-11-03 02:51:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:51:11,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:11,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:11,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:51:11,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1879035821, now seen corresponding path program 1 times [2022-11-03 02:51:11,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:11,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165797421] [2022-11-03 02:51:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:12,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:12,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165797421] [2022-11-03 02:51:12,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165797421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:12,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:12,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238717507] [2022-11-03 02:51:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:12,154 INFO L87 Difference]: Start difference. First operand 2111 states and 3131 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:13,034 INFO L93 Difference]: Finished difference Result 5615 states and 8367 transitions. [2022-11-03 02:51:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:13,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-11-03 02:51:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:13,046 INFO L225 Difference]: With dead ends: 5615 [2022-11-03 02:51:13,048 INFO L226 Difference]: Without dead ends: 3643 [2022-11-03 02:51:13,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:13,052 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 586 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:13,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 751 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2022-11-03 02:51:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 3641. [2022-11-03 02:51:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 1.4733516483516484) internal successors, (5363), 3640 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5363 transitions. [2022-11-03 02:51:13,582 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5363 transitions. Word has length 126 [2022-11-03 02:51:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:13,583 INFO L495 AbstractCegarLoop]: Abstraction has 3641 states and 5363 transitions. [2022-11-03 02:51:13,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5363 transitions. [2022-11-03 02:51:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:13,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:13,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:13,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:51:13,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 376216476, now seen corresponding path program 1 times [2022-11-03 02:51:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:13,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220241392] [2022-11-03 02:51:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:14,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220241392] [2022-11-03 02:51:14,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220241392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:14,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:14,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:14,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562058392] [2022-11-03 02:51:14,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:14,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:14,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:14,521 INFO L87 Difference]: Start difference. First operand 3641 states and 5363 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:15,878 INFO L93 Difference]: Finished difference Result 7063 states and 10407 transitions. [2022-11-03 02:51:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:51:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:15,896 INFO L225 Difference]: With dead ends: 7063 [2022-11-03 02:51:15,896 INFO L226 Difference]: Without dead ends: 5334 [2022-11-03 02:51:15,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:15,901 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1361 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:15,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 567 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2022-11-03 02:51:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5332. [2022-11-03 02:51:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 1.4582629900581505) internal successors, (7774), 5331 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 7774 transitions. [2022-11-03 02:51:17,131 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 7774 transitions. Word has length 131 [2022-11-03 02:51:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:17,132 INFO L495 AbstractCegarLoop]: Abstraction has 5332 states and 7774 transitions. [2022-11-03 02:51:17,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 7774 transitions. [2022-11-03 02:51:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:17,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:17,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:17,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:51:17,138 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2032930890, now seen corresponding path program 1 times [2022-11-03 02:51:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:17,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317010692] [2022-11-03 02:51:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:17,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:23,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317010692] [2022-11-03 02:51:23,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317010692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:23,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:23,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-03 02:51:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880388148] [2022-11-03 02:51:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:51:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:51:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:51:23,889 INFO L87 Difference]: Start difference. First operand 5332 states and 7774 transitions. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:36,175 INFO L93 Difference]: Finished difference Result 7733 states and 11129 transitions. [2022-11-03 02:51:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:51:36,176 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:51:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:36,196 INFO L225 Difference]: With dead ends: 7733 [2022-11-03 02:51:36,196 INFO L226 Difference]: Without dead ends: 6063 [2022-11-03 02:51:36,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=411, Invalid=1481, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:51:36,200 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1936 mSDsluCounter, 4320 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 4602 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:36,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1936 Valid, 4602 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 02:51:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-11-03 02:51:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 5425. [2022-11-03 02:51:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 1.4540929203539823) internal successors, (7887), 5424 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 7887 transitions. [2022-11-03 02:51:37,272 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 7887 transitions. Word has length 131 [2022-11-03 02:51:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:37,273 INFO L495 AbstractCegarLoop]: Abstraction has 5425 states and 7887 transitions. [2022-11-03 02:51:37,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 7887 transitions. [2022-11-03 02:51:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:37,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:37,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:37,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:51:37,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1365594929, now seen corresponding path program 1 times [2022-11-03 02:51:37,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:37,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986363978] [2022-11-03 02:51:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:37,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986363978] [2022-11-03 02:51:37,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986363978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:37,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:37,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121655817] [2022-11-03 02:51:37,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:37,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:37,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:37,386 INFO L87 Difference]: Start difference. First operand 5425 states and 7887 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:38,757 INFO L93 Difference]: Finished difference Result 10417 states and 15282 transitions. [2022-11-03 02:51:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:51:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:38,784 INFO L225 Difference]: With dead ends: 10417 [2022-11-03 02:51:38,785 INFO L226 Difference]: Without dead ends: 7838 [2022-11-03 02:51:38,790 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:38,791 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 207 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:38,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 725 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2022-11-03 02:51:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2022-11-03 02:51:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 1.4430121250797703) internal successors, (11306), 7835 states have internal predecessors, (11306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 11306 transitions. [2022-11-03 02:51:40,093 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 11306 transitions. Word has length 131 [2022-11-03 02:51:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:40,093 INFO L495 AbstractCegarLoop]: Abstraction has 7836 states and 11306 transitions. [2022-11-03 02:51:40,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 11306 transitions. [2022-11-03 02:51:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:40,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:40,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:51:40,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash 155096622, now seen corresponding path program 1 times [2022-11-03 02:51:40,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:40,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772400605] [2022-11-03 02:51:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:40,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:40,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772400605] [2022-11-03 02:51:40,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772400605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:40,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:40,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:40,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551651255] [2022-11-03 02:51:40,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:40,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:40,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:40,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:40,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:40,800 INFO L87 Difference]: Start difference. First operand 7836 states and 11306 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:42,148 INFO L93 Difference]: Finished difference Result 10420 states and 15152 transitions. [2022-11-03 02:51:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:51:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:42,166 INFO L225 Difference]: With dead ends: 10420 [2022-11-03 02:51:42,166 INFO L226 Difference]: Without dead ends: 7273 [2022-11-03 02:51:42,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:51:42,172 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 851 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:42,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 776 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2022-11-03 02:51:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 7271. [2022-11-03 02:51:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 7270 states have (on average 1.4444291609353508) internal successors, (10501), 7270 states have internal predecessors, (10501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10501 transitions. [2022-11-03 02:51:43,506 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10501 transitions. Word has length 131 [2022-11-03 02:51:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:43,506 INFO L495 AbstractCegarLoop]: Abstraction has 7271 states and 10501 transitions. [2022-11-03 02:51:43,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10501 transitions. [2022-11-03 02:51:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:43,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:43,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:43,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:51:43,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1698102289, now seen corresponding path program 1 times [2022-11-03 02:51:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:43,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842662343] [2022-11-03 02:51:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:43,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:43,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:43,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842662343] [2022-11-03 02:51:43,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842662343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:43,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:43,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:43,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757766614] [2022-11-03 02:51:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:43,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:43,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:43,660 INFO L87 Difference]: Start difference. First operand 7271 states and 10501 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:45,197 INFO L93 Difference]: Finished difference Result 14439 states and 20883 transitions. [2022-11-03 02:51:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:51:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:45,217 INFO L225 Difference]: With dead ends: 14439 [2022-11-03 02:51:45,218 INFO L226 Difference]: Without dead ends: 7271 [2022-11-03 02:51:45,227 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:51:45,228 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 878 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:45,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 256 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2022-11-03 02:51:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7271. [2022-11-03 02:51:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 7270 states have (on average 1.427372764786795) internal successors, (10377), 7270 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10377 transitions. [2022-11-03 02:51:46,507 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10377 transitions. Word has length 131 [2022-11-03 02:51:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:46,508 INFO L495 AbstractCegarLoop]: Abstraction has 7271 states and 10377 transitions. [2022-11-03 02:51:46,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:46,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10377 transitions. [2022-11-03 02:51:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:46,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:46,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:46,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:51:46,514 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:46,514 INFO L85 PathProgramCache]: Analyzing trace with hash 985329552, now seen corresponding path program 1 times [2022-11-03 02:51:46,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:46,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220477400] [2022-11-03 02:51:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:46,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220477400] [2022-11-03 02:51:47,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220477400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:47,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:47,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:51:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125268457] [2022-11-03 02:51:47,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:47,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:51:47,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:51:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:47,368 INFO L87 Difference]: Start difference. First operand 7271 states and 10377 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:49,011 INFO L93 Difference]: Finished difference Result 12240 states and 17725 transitions. [2022-11-03 02:51:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:51:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:51:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:49,027 INFO L225 Difference]: With dead ends: 12240 [2022-11-03 02:51:49,027 INFO L226 Difference]: Without dead ends: 7665 [2022-11-03 02:51:49,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:51:49,033 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 942 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:49,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 679 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7665 states. [2022-11-03 02:51:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7665 to 6468. [2022-11-03 02:51:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 1.4284830678830989) internal successors, (9238), 6467 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 9238 transitions. [2022-11-03 02:51:50,204 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 9238 transitions. Word has length 131 [2022-11-03 02:51:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:50,204 INFO L495 AbstractCegarLoop]: Abstraction has 6468 states and 9238 transitions. [2022-11-03 02:51:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 9238 transitions. [2022-11-03 02:51:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:51:50,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:50,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:50,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:51:50,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1535946816, now seen corresponding path program 1 times [2022-11-03 02:51:50,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:50,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803869356] [2022-11-03 02:51:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:50,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:56,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803869356] [2022-11-03 02:51:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803869356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:56,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:56,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-03 02:51:56,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007797760] [2022-11-03 02:51:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:56,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:51:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:51:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:51:56,226 INFO L87 Difference]: Start difference. First operand 6468 states and 9238 transitions. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:07,679 INFO L93 Difference]: Finished difference Result 10669 states and 15146 transitions. [2022-11-03 02:52:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:52:07,679 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:52:07,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:07,693 INFO L225 Difference]: With dead ends: 10669 [2022-11-03 02:52:07,693 INFO L226 Difference]: Without dead ends: 7354 [2022-11-03 02:52:07,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=408, Invalid=1484, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:52:07,698 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 998 mSDsluCounter, 6123 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 6488 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:07,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 6488 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:52:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7354 states. [2022-11-03 02:52:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7354 to 6590. [2022-11-03 02:52:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6590 states, 6589 states have (on average 1.4232812262862347) internal successors, (9378), 6589 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 9378 transitions. [2022-11-03 02:52:09,340 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 9378 transitions. Word has length 131 [2022-11-03 02:52:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:09,340 INFO L495 AbstractCegarLoop]: Abstraction has 6590 states and 9378 transitions. [2022-11-03 02:52:09,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 9378 transitions. [2022-11-03 02:52:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:52:09,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:09,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:09,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:52:09,345 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1928959065, now seen corresponding path program 1 times [2022-11-03 02:52:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:09,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358852705] [2022-11-03 02:52:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:09,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:09,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358852705] [2022-11-03 02:52:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358852705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:09,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:09,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768010125] [2022-11-03 02:52:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:09,422 INFO L87 Difference]: Start difference. First operand 6590 states and 9378 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:10,726 INFO L93 Difference]: Finished difference Result 10479 states and 14933 transitions. [2022-11-03 02:52:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-03 02:52:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:10,738 INFO L225 Difference]: With dead ends: 10479 [2022-11-03 02:52:10,738 INFO L226 Difference]: Without dead ends: 6614 [2022-11-03 02:52:10,744 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:52:10,745 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 244 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:10,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 271 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6614 states. [2022-11-03 02:52:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6614 to 6542. [2022-11-03 02:52:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6542 states, 6541 states have (on average 1.4188961932426234) internal successors, (9281), 6541 states have internal predecessors, (9281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 9281 transitions. [2022-11-03 02:52:12,372 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 9281 transitions. Word has length 132 [2022-11-03 02:52:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:12,372 INFO L495 AbstractCegarLoop]: Abstraction has 6542 states and 9281 transitions. [2022-11-03 02:52:12,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 9281 transitions. [2022-11-03 02:52:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:52:12,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:12,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:12,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:52:12,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1644653967, now seen corresponding path program 1 times [2022-11-03 02:52:12,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:12,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771318659] [2022-11-03 02:52:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:12,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:12,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771318659] [2022-11-03 02:52:12,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771318659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:12,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:12,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:12,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652911503] [2022-11-03 02:52:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:12,461 INFO L87 Difference]: Start difference. First operand 6542 states and 9281 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:13,968 INFO L93 Difference]: Finished difference Result 11532 states and 16325 transitions. [2022-11-03 02:52:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:13,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-03 02:52:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:13,983 INFO L225 Difference]: With dead ends: 11532 [2022-11-03 02:52:13,983 INFO L226 Difference]: Without dead ends: 7151 [2022-11-03 02:52:13,989 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:52:13,989 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 246 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 340 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-11-03 02:52:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 6494. [2022-11-03 02:52:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6494 states, 6493 states have (on average 1.4144463268134915) internal successors, (9184), 6493 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6494 states to 6494 states and 9184 transitions. [2022-11-03 02:52:15,186 INFO L78 Accepts]: Start accepts. Automaton has 6494 states and 9184 transitions. Word has length 132 [2022-11-03 02:52:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:15,187 INFO L495 AbstractCegarLoop]: Abstraction has 6494 states and 9184 transitions. [2022-11-03 02:52:15,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 6494 states and 9184 transitions. [2022-11-03 02:52:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:52:15,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:15,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:52:15,191 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash 980274033, now seen corresponding path program 1 times [2022-11-03 02:52:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:15,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22451231] [2022-11-03 02:52:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:15,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:15,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22451231] [2022-11-03 02:52:15,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22451231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:15,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:15,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505054749] [2022-11-03 02:52:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:15,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:15,264 INFO L87 Difference]: Start difference. First operand 6494 states and 9184 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:16,918 INFO L93 Difference]: Finished difference Result 11338 states and 15955 transitions. [2022-11-03 02:52:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-03 02:52:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:16,928 INFO L225 Difference]: With dead ends: 11338 [2022-11-03 02:52:16,929 INFO L226 Difference]: Without dead ends: 7365 [2022-11-03 02:52:16,934 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:52:16,935 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 249 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:16,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 381 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7365 states. [2022-11-03 02:52:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7365 to 6434. [2022-11-03 02:52:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 1.4106948546556817) internal successors, (9075), 6433 states have internal predecessors, (9075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 9075 transitions. [2022-11-03 02:52:18,409 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 9075 transitions. Word has length 132 [2022-11-03 02:52:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:18,409 INFO L495 AbstractCegarLoop]: Abstraction has 6434 states and 9075 transitions. [2022-11-03 02:52:18,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 9075 transitions. [2022-11-03 02:52:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:52:18,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:18,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:18,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:52:18,413 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash 522978550, now seen corresponding path program 1 times [2022-11-03 02:52:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322558597] [2022-11-03 02:52:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:18,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322558597] [2022-11-03 02:52:18,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322558597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:18,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:18,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:18,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480302841] [2022-11-03 02:52:18,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:18,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:18,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:18,483 INFO L87 Difference]: Start difference. First operand 6434 states and 9075 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:20,225 INFO L93 Difference]: Finished difference Result 14181 states and 19887 transitions. [2022-11-03 02:52:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:20,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-03 02:52:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:20,235 INFO L225 Difference]: With dead ends: 14181 [2022-11-03 02:52:20,235 INFO L226 Difference]: Without dead ends: 8017 [2022-11-03 02:52:20,241 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:52:20,241 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 243 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:20,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 357 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2022-11-03 02:52:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 6357. [2022-11-03 02:52:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6357 states, 6356 states have (on average 1.4046570169918187) internal successors, (8928), 6356 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6357 states to 6357 states and 8928 transitions. [2022-11-03 02:52:21,470 INFO L78 Accepts]: Start accepts. Automaton has 6357 states and 8928 transitions. Word has length 132 [2022-11-03 02:52:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:21,470 INFO L495 AbstractCegarLoop]: Abstraction has 6357 states and 8928 transitions. [2022-11-03 02:52:21,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6357 states and 8928 transitions. [2022-11-03 02:52:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:52:21,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:21,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:21,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:52:21,474 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash 713413560, now seen corresponding path program 1 times [2022-11-03 02:52:21,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:21,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971083819] [2022-11-03 02:52:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:21,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:21,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:21,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971083819] [2022-11-03 02:52:21,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971083819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:21,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:21,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078636283] [2022-11-03 02:52:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:21,548 INFO L87 Difference]: Start difference. First operand 6357 states and 8928 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:23,223 INFO L93 Difference]: Finished difference Result 11619 states and 16332 transitions. [2022-11-03 02:52:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:23,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-03 02:52:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:23,234 INFO L225 Difference]: With dead ends: 11619 [2022-11-03 02:52:23,234 INFO L226 Difference]: Without dead ends: 6911 [2022-11-03 02:52:23,238 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:52:23,239 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 229 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:23,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 301 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6911 states. [2022-11-03 02:52:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6911 to 6292. [2022-11-03 02:52:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 6291 states have (on average 1.3996185026227945) internal successors, (8805), 6291 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 8805 transitions. [2022-11-03 02:52:24,758 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 8805 transitions. Word has length 132 [2022-11-03 02:52:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:24,758 INFO L495 AbstractCegarLoop]: Abstraction has 6292 states and 8805 transitions. [2022-11-03 02:52:24,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 8805 transitions. [2022-11-03 02:52:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:52:24,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:24,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:52:24,762 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash 228857818, now seen corresponding path program 1 times [2022-11-03 02:52:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:24,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798435198] [2022-11-03 02:52:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:24,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:24,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798435198] [2022-11-03 02:52:24,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798435198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:24,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:24,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:24,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746098084] [2022-11-03 02:52:24,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:24,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:24,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:24,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:24,853 INFO L87 Difference]: Start difference. First operand 6292 states and 8805 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:26,485 INFO L93 Difference]: Finished difference Result 10960 states and 15382 transitions. [2022-11-03 02:52:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-03 02:52:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:26,495 INFO L225 Difference]: With dead ends: 10960 [2022-11-03 02:52:26,495 INFO L226 Difference]: Without dead ends: 6353 [2022-11-03 02:52:26,501 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:52:26,501 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 214 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:26,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 267 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:52:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2022-11-03 02:52:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6188. [2022-11-03 02:52:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6188 states, 6187 states have (on average 1.3959915952804267) internal successors, (8637), 6187 states have internal predecessors, (8637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6188 states to 6188 states and 8637 transitions. [2022-11-03 02:52:27,758 INFO L78 Accepts]: Start accepts. Automaton has 6188 states and 8637 transitions. Word has length 132 [2022-11-03 02:52:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:27,758 INFO L495 AbstractCegarLoop]: Abstraction has 6188 states and 8637 transitions. [2022-11-03 02:52:27,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6188 states and 8637 transitions. [2022-11-03 02:52:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:52:27,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:27,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:27,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:52:27,761 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 190276819, now seen corresponding path program 1 times [2022-11-03 02:52:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:27,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901243857] [2022-11-03 02:52:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:35,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901243857] [2022-11-03 02:52:35,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901243857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:35,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:35,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-11-03 02:52:35,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365849610] [2022-11-03 02:52:35,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:35,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:52:35,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:52:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:52:35,584 INFO L87 Difference]: Start difference. First operand 6188 states and 8637 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:49,981 INFO L93 Difference]: Finished difference Result 15903 states and 22937 transitions. [2022-11-03 02:52:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:52:49,984 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:52:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:49,995 INFO L225 Difference]: With dead ends: 15903 [2022-11-03 02:52:49,995 INFO L226 Difference]: Without dead ends: 11096 [2022-11-03 02:52:50,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=770, Invalid=4632, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 02:52:50,002 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1984 mSDsluCounter, 4320 mSDsCounter, 0 mSdLazyCounter, 3978 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 4533 SdHoareTripleChecker+Invalid, 4055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1984 Valid, 4533 Invalid, 4055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3978 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:52:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11096 states. [2022-11-03 02:52:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11096 to 10858. [2022-11-03 02:52:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10858 states, 10857 states have (on average 1.4251634889932763) internal successors, (15473), 10857 states have internal predecessors, (15473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10858 states to 10858 states and 15473 transitions. [2022-11-03 02:52:52,277 INFO L78 Accepts]: Start accepts. Automaton has 10858 states and 15473 transitions. Word has length 134 [2022-11-03 02:52:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:52,277 INFO L495 AbstractCegarLoop]: Abstraction has 10858 states and 15473 transitions. [2022-11-03 02:52:52,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 10858 states and 15473 transitions. [2022-11-03 02:52:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:52:52,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:52,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:52,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:52:52,281 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash -664181913, now seen corresponding path program 1 times [2022-11-03 02:52:52,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469676730] [2022-11-03 02:52:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:52,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:59,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:59,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469676730] [2022-11-03 02:52:59,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469676730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:59,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:59,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-11-03 02:52:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553908967] [2022-11-03 02:52:59,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:59,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:52:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:52:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:52:59,512 INFO L87 Difference]: Start difference. First operand 10858 states and 15473 transitions. Second operand has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:18,986 INFO L93 Difference]: Finished difference Result 20026 states and 28588 transitions. [2022-11-03 02:53:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-03 02:53:18,986 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:53:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:19,005 INFO L225 Difference]: With dead ends: 20026 [2022-11-03 02:53:19,005 INFO L226 Difference]: Without dead ends: 16970 [2022-11-03 02:53:19,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=819, Invalid=4881, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:53:19,010 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 2547 mSDsluCounter, 5514 mSDsCounter, 0 mSdLazyCounter, 4563 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 5711 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:19,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2547 Valid, 5711 Invalid, 4689 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [126 Valid, 4563 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 02:53:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16970 states. [2022-11-03 02:53:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16970 to 12612. [2022-11-03 02:53:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12612 states, 12611 states have (on average 1.4266909840615336) internal successors, (17992), 12611 states have internal predecessors, (17992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12612 states to 12612 states and 17992 transitions. [2022-11-03 02:53:22,343 INFO L78 Accepts]: Start accepts. Automaton has 12612 states and 17992 transitions. Word has length 134 [2022-11-03 02:53:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:22,343 INFO L495 AbstractCegarLoop]: Abstraction has 12612 states and 17992 transitions. [2022-11-03 02:53:22,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 12612 states and 17992 transitions. [2022-11-03 02:53:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:53:22,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:22,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 02:53:22,345 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1187251943, now seen corresponding path program 1 times [2022-11-03 02:53:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:22,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818361545] [2022-11-03 02:53:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:29,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818361545] [2022-11-03 02:53:29,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818361545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:29,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:29,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-11-03 02:53:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721082610] [2022-11-03 02:53:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:29,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:53:29,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:53:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:53:29,864 INFO L87 Difference]: Start difference. First operand 12612 states and 17992 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:48,377 INFO L93 Difference]: Finished difference Result 22620 states and 32443 transitions. [2022-11-03 02:53:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:53:48,378 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:53:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:48,400 INFO L225 Difference]: With dead ends: 22620 [2022-11-03 02:53:48,400 INFO L226 Difference]: Without dead ends: 18739 [2022-11-03 02:53:48,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=929, Invalid=4621, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:53:48,408 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 2055 mSDsluCounter, 5144 mSDsCounter, 0 mSdLazyCounter, 4311 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 5338 SdHoareTripleChecker+Invalid, 4438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:48,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 5338 Invalid, 4438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4311 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 02:53:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18739 states. [2022-11-03 02:53:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18739 to 12593. [2022-11-03 02:53:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12593 states, 12592 states have (on average 1.4264612452350698) internal successors, (17962), 12592 states have internal predecessors, (17962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12593 states to 12593 states and 17962 transitions. [2022-11-03 02:53:52,315 INFO L78 Accepts]: Start accepts. Automaton has 12593 states and 17962 transitions. Word has length 134 [2022-11-03 02:53:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:52,315 INFO L495 AbstractCegarLoop]: Abstraction has 12593 states and 17962 transitions. [2022-11-03 02:53:52,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 12593 states and 17962 transitions. [2022-11-03 02:53:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:53:52,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:52,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:52,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 02:53:52,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1080483705, now seen corresponding path program 1 times [2022-11-03 02:53:52,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221259605] [2022-11-03 02:53:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:00,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221259605] [2022-11-03 02:54:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221259605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:00,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:00,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-11-03 02:54:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69962589] [2022-11-03 02:54:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:54:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:54:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:54:00,524 INFO L87 Difference]: Start difference. First operand 12593 states and 17962 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:56:16,805 INFO L93 Difference]: Finished difference Result 73753 states and 107215 transitions. [2022-11-03 02:56:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-11-03 02:56:16,806 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:56:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:56:16,908 INFO L225 Difference]: With dead ends: 73753 [2022-11-03 02:56:16,908 INFO L226 Difference]: Without dead ends: 67760 [2022-11-03 02:56:16,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12639 ImplicationChecksByTransitivity, 89.4s TimeCoverageRelationStatistics Valid=6780, Invalid=31440, Unknown=0, NotChecked=0, Total=38220 [2022-11-03 02:56:16,929 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 7088 mSDsluCounter, 14505 mSDsCounter, 0 mSdLazyCounter, 15083 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7088 SdHoareTripleChecker+Valid, 14682 SdHoareTripleChecker+Invalid, 15475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 15083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:56:16,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7088 Valid, 14682 Invalid, 15475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [392 Valid, 15083 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2022-11-03 02:56:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67760 states. [2022-11-03 02:56:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67760 to 31130. [2022-11-03 02:56:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31130 states, 31129 states have (on average 1.4521828520029554) internal successors, (45205), 31129 states have internal predecessors, (45205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31130 states to 31130 states and 45205 transitions. [2022-11-03 02:56:31,074 INFO L78 Accepts]: Start accepts. Automaton has 31130 states and 45205 transitions. Word has length 134 [2022-11-03 02:56:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:56:31,074 INFO L495 AbstractCegarLoop]: Abstraction has 31130 states and 45205 transitions. [2022-11-03 02:56:31,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 40 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:56:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31130 states and 45205 transitions. [2022-11-03 02:56:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:56:31,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:56:31,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:56:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:56:31,077 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:56:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:56:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash -689081663, now seen corresponding path program 1 times [2022-11-03 02:56:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:56:31,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089109781] [2022-11-03 02:56:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:56:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:56:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:56:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:56:39,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:56:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089109781] [2022-11-03 02:56:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089109781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:56:39,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:56:39,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-11-03 02:56:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018718550] [2022-11-03 02:56:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:56:39,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:56:39,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:56:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:56:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:56:39,181 INFO L87 Difference]: Start difference. First operand 31130 states and 45205 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:14,021 INFO L93 Difference]: Finished difference Result 46047 states and 67085 transitions. [2022-11-03 02:57:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 02:57:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:57:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:14,074 INFO L225 Difference]: With dead ends: 46047 [2022-11-03 02:57:14,074 INFO L226 Difference]: Without dead ends: 40379 [2022-11-03 02:57:14,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=749, Invalid=4507, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 02:57:14,084 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1366 mSDsluCounter, 5501 mSDsCounter, 0 mSdLazyCounter, 4455 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 5751 SdHoareTripleChecker+Invalid, 4483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:14,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 5751 Invalid, 4483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4455 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 02:57:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40379 states. [2022-11-03 02:57:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40379 to 31198. [2022-11-03 02:57:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31198 states, 31197 states have (on average 1.4514216110523448) internal successors, (45280), 31197 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31198 states to 31198 states and 45280 transitions. [2022-11-03 02:57:29,123 INFO L78 Accepts]: Start accepts. Automaton has 31198 states and 45280 transitions. Word has length 134 [2022-11-03 02:57:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:29,124 INFO L495 AbstractCegarLoop]: Abstraction has 31198 states and 45280 transitions. [2022-11-03 02:57:29,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:57:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 31198 states and 45280 transitions. [2022-11-03 02:57:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:57:29,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:29,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:57:29,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 02:57:29,126 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1860384615, now seen corresponding path program 1 times [2022-11-03 02:57:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:57:29,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009052212] [2022-11-03 02:57:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:57:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:57:35,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:57:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009052212] [2022-11-03 02:57:35,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009052212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:57:35,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:57:35,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-11-03 02:57:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498489607] [2022-11-03 02:57:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:57:35,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:57:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:57:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:57:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:57:35,946 INFO L87 Difference]: Start difference. First operand 31198 states and 45280 transitions. Second operand has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:07,654 INFO L93 Difference]: Finished difference Result 48506 states and 70795 transitions. [2022-11-03 02:58:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:58:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:58:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:07,718 INFO L225 Difference]: With dead ends: 48506 [2022-11-03 02:58:07,718 INFO L226 Difference]: Without dead ends: 42804 [2022-11-03 02:58:07,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=620, Invalid=3936, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 02:58:07,730 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1333 mSDsluCounter, 6478 mSDsCounter, 0 mSdLazyCounter, 5647 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 6744 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 5647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:07,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1333 Valid, 6744 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 5647 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-03 02:58:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42804 states. [2022-11-03 02:58:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42804 to 33704. [2022-11-03 02:58:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 1.4528676972376346) internal successors, (48966), 33703 states have internal predecessors, (48966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 48966 transitions. [2022-11-03 02:58:22,379 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 48966 transitions. Word has length 134 [2022-11-03 02:58:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:22,380 INFO L495 AbstractCegarLoop]: Abstraction has 33704 states and 48966 transitions. [2022-11-03 02:58:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.6216216216216215) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 48966 transitions. [2022-11-03 02:58:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:58:22,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:22,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 02:58:22,383 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1664892636, now seen corresponding path program 1 times [2022-11-03 02:58:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:58:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089636141] [2022-11-03 02:58:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:58:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:58:22,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:58:22,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089636141] [2022-11-03 02:58:22,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089636141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:58:22,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:58:22,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:58:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060568627] [2022-11-03 02:58:22,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:58:22,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:58:22,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:58:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:58:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:58:22,459 INFO L87 Difference]: Start difference. First operand 33704 states and 48966 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)