./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh --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 1cf988187e51661749a7431d3b54c72cef46dbc57db121ef5e55cfa0bf7b27cc --- 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-2329fc7 [2022-12-14 15:29:50,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:29:50,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:29:50,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:29:50,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:29:50,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:29:50,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:29:50,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:29:50,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:29:50,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:29:50,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:29:50,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:29:50,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:29:50,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:29:50,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:29:50,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:29:50,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:29:50,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:29:50,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:29:50,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:29:50,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:29:50,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:29:50,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:29:50,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:29:50,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:29:50,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:29:50,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:29:50,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:29:50,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:29:50,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:29:50,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:29:50,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:29:50,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:29:50,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:29:50,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:29:50,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:29:50,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:29:50,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:29:50,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:29:50,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:29:50,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:29:50,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:29:50,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:29:50,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:29:50,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:29:50,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:29:50,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:29:50,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:29:50,886 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:29:50,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:29:50,886 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:29:50,886 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:29:50,887 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:29:50,887 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:29:50,887 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:29:50,887 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:29:50,887 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:29:50,887 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:29:50,888 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:29:50,888 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:29:50,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:29:50,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:29:50,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:29:50,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:29:50,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:29:50,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:29:50,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:29:50,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:29:50,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:29:50,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:29:50,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:29:50,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:29:50,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:29:50,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:29:50,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:29:50,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:29:50,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:29:50,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:29:50,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:29:50,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:29:50,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:29:50,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:29:50,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:29:50,892 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_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cf988187e51661749a7431d3b54c72cef46dbc57db121ef5e55cfa0bf7b27cc [2022-12-14 15:29:51,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:29:51,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:29:51,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:29:51,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:29:51,114 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:29:51,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-12-14 15:29:53,722 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:29:53,919 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:29:53,919 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-12-14 15:29:53,929 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/data/e66d534bd/4397c69d0fd04800a2e628eebb0fdf7f/FLAG0b25bfe32 [2022-12-14 15:29:53,940 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/data/e66d534bd/4397c69d0fd04800a2e628eebb0fdf7f [2022-12-14 15:29:53,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:29:53,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:29:53,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:29:53,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:29:53,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:29:53,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:29:53" (1/1) ... [2022-12-14 15:29:53,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1d03d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:53, skipping insertion in model container [2022-12-14 15:29:53,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:29:53" (1/1) ... [2022-12-14 15:29:53,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:29:54,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:29:54,252 WARN L237 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_f581264b-e6c5-45c2-ac34-8645266d92c4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13915,13928] [2022-12-14 15:29:54,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:29:54,315 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:29:54,376 WARN L237 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_f581264b-e6c5-45c2-ac34-8645266d92c4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13915,13928] [2022-12-14 15:29:54,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:29:54,422 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:29:54,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54 WrapperNode [2022-12-14 15:29:54,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:29:54,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:29:54,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:29:54,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:29:54,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,483 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1176 [2022-12-14 15:29:54,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:29:54,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:29:54,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:29:54,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:29:54,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,522 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:29:54,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:29:54,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:29:54,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:29:54,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (1/1) ... [2022-12-14 15:29:54,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:29:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:54,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:29:54,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581264b-e6c5-45c2-ac34-8645266d92c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:29:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:29:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:29:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:29:54,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:29:54,734 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:29:54,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:29:55,380 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:29:55,554 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:29:55,554 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 15:29:55,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:29:55 BoogieIcfgContainer [2022-12-14 15:29:55,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:29:55,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:29:55,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:29:55,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:29:55,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:29:53" (1/3) ... [2022-12-14 15:29:55,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6602e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:29:55, skipping insertion in model container [2022-12-14 15:29:55,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:54" (2/3) ... [2022-12-14 15:29:55,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6602e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:29:55, skipping insertion in model container [2022-12-14 15:29:55,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:29:55" (3/3) ... [2022-12-14 15:29:55,562 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2022-12-14 15:29:55,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:29:55,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:29:55,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:29:55,617 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;@5b925692, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:29:55,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:29:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 214 states have (on average 1.6261682242990654) internal successors, (348), 257 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 15:29:55,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:55,629 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] [2022-12-14 15:29:55,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1184427027, now seen corresponding path program 1 times [2022-12-14 15:29:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967002127] [2022-12-14 15:29:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:56,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967002127] [2022-12-14 15:29:56,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967002127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:56,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:56,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:29:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631769611] [2022-12-14 15:29:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:56,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:29:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:29:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:29:56,059 INFO L87 Difference]: Start difference. First operand has 258 states, 214 states have (on average 1.6261682242990654) internal successors, (348), 257 states have internal predecessors, (348), 0 states have call successors, (0), 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 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:56,241 INFO L93 Difference]: Finished difference Result 439 states and 616 transitions. [2022-12-14 15:29:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:29:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-14 15:29:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:56,251 INFO L225 Difference]: With dead ends: 439 [2022-12-14 15:29:56,251 INFO L226 Difference]: Without dead ends: 214 [2022-12-14 15:29:56,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:56,256 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 268 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:56,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 670 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-12-14 15:29:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-12-14 15:29:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.3990610328638498) internal successors, (298), 213 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2022-12-14 15:29:56,295 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 66 [2022-12-14 15:29:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:56,295 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2022-12-14 15:29:56,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2022-12-14 15:29:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 15:29:56,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:56,298 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] [2022-12-14 15:29:56,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:29:56,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2030745844, now seen corresponding path program 1 times [2022-12-14 15:29:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772045364] [2022-12-14 15:29:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:56,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:56,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772045364] [2022-12-14 15:29:56,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772045364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:56,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:56,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:29:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053672290] [2022-12-14 15:29:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:56,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:56,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:56,421 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:56,551 INFO L93 Difference]: Finished difference Result 496 states and 717 transitions. [2022-12-14 15:29:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:56,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2022-12-14 15:29:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:56,553 INFO L225 Difference]: With dead ends: 496 [2022-12-14 15:29:56,553 INFO L226 Difference]: Without dead ends: 330 [2022-12-14 15:29:56,553 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 [2022-12-14 15:29:56,554 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 190 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:56,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 529 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-14 15:29:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-12-14 15:29:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.4250764525993884) internal successors, (466), 327 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 466 transitions. [2022-12-14 15:29:56,591 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 466 transitions. Word has length 105 [2022-12-14 15:29:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:56,592 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 466 transitions. [2022-12-14 15:29:56,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 466 transitions. [2022-12-14 15:29:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 15:29:56,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:56,595 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] [2022-12-14 15:29:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:29:56,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1433744550, now seen corresponding path program 1 times [2022-12-14 15:29:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233644232] [2022-12-14 15:29:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:56,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:56,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233644232] [2022-12-14 15:29:56,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233644232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:56,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:56,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:29:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36953462] [2022-12-14 15:29:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:56,702 INFO L87 Difference]: Start difference. First operand 328 states and 466 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:56,831 INFO L93 Difference]: Finished difference Result 812 states and 1184 transitions. [2022-12-14 15:29:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-12-14 15:29:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:56,833 INFO L225 Difference]: With dead ends: 812 [2022-12-14 15:29:56,833 INFO L226 Difference]: Without dead ends: 538 [2022-12-14 15:29:56,834 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 [2022-12-14 15:29:56,835 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 185 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:56,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 473 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-12-14 15:29:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-12-14 15:29:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.4411214953271028) internal successors, (771), 535 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 771 transitions. [2022-12-14 15:29:56,866 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 771 transitions. Word has length 111 [2022-12-14 15:29:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:56,867 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 771 transitions. [2022-12-14 15:29:56,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 771 transitions. [2022-12-14 15:29:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 15:29:56,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:56,874 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] [2022-12-14 15:29:56,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:29:56,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 734924743, now seen corresponding path program 1 times [2022-12-14 15:29:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:56,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386551742] [2022-12-14 15:29:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:57,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:57,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386551742] [2022-12-14 15:29:57,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386551742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:57,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:57,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:29:57,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065847368] [2022-12-14 15:29:57,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:57,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:57,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:57,010 INFO L87 Difference]: Start difference. First operand 536 states and 771 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:57,189 INFO L93 Difference]: Finished difference Result 1390 states and 2032 transitions. [2022-12-14 15:29:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2022-12-14 15:29:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:57,194 INFO L225 Difference]: With dead ends: 1390 [2022-12-14 15:29:57,195 INFO L226 Difference]: Without dead ends: 914 [2022-12-14 15:29:57,196 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 [2022-12-14 15:29:57,197 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 179 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 469 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 [2022-12-14 15:29:57,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 469 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-12-14 15:29:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 912. [2022-12-14 15:29:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.446761800219539) internal successors, (1318), 911 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1318 transitions. [2022-12-14 15:29:57,280 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1318 transitions. Word has length 117 [2022-12-14 15:29:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:57,281 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1318 transitions. [2022-12-14 15:29:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1318 transitions. [2022-12-14 15:29:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 15:29:57,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:57,283 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] [2022-12-14 15:29:57,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:29:57,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2050316096, now seen corresponding path program 1 times [2022-12-14 15:29:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:57,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625800120] [2022-12-14 15:29:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:57,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:57,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:57,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625800120] [2022-12-14 15:29:57,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625800120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:57,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:57,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:29:57,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177152180] [2022-12-14 15:29:57,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:57,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:57,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:57,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:57,398 INFO L87 Difference]: Start difference. First operand 912 states and 1318 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) [2022-12-14 15:29:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:57,663 INFO L93 Difference]: Finished difference Result 2432 states and 3546 transitions. [2022-12-14 15:29:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:57,664 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 [2022-12-14 15:29:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:57,667 INFO L225 Difference]: With dead ends: 2432 [2022-12-14 15:29:57,667 INFO L226 Difference]: Without dead ends: 1586 [2022-12-14 15:29:57,668 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 [2022-12-14 15:29:57,669 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 173 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 465 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 [2022-12-14 15:29:57,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 465 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-12-14 15:29:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1584. [2022-12-14 15:29:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 1.443461781427669) internal successors, (2285), 1583 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2285 transitions. [2022-12-14 15:29:57,817 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2285 transitions. Word has length 123 [2022-12-14 15:29:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:57,818 INFO L495 AbstractCegarLoop]: Abstraction has 1584 states and 2285 transitions. [2022-12-14 15:29:57,818 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) [2022-12-14 15:29:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2285 transitions. [2022-12-14 15:29:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 15:29:57,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:57,823 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] [2022-12-14 15:29:57,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:29:57,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1277481855, now seen corresponding path program 1 times [2022-12-14 15:29:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:57,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079254074] [2022-12-14 15:29:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:57,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:57,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079254074] [2022-12-14 15:29:57,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079254074] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:57,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:57,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:29:57,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591359723] [2022-12-14 15:29:57,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:57,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:57,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:57,936 INFO L87 Difference]: Start difference. First operand 1584 states and 2285 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:58,277 INFO L93 Difference]: Finished difference Result 4282 states and 6200 transitions. [2022-12-14 15:29:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2022-12-14 15:29:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:58,286 INFO L225 Difference]: With dead ends: 4282 [2022-12-14 15:29:58,286 INFO L226 Difference]: Without dead ends: 2770 [2022-12-14 15:29:58,289 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 [2022-12-14 15:29:58,290 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 167 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:58,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 461 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2022-12-14 15:29:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2768. [2022-12-14 15:29:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 1.432598482110589) internal successors, (3964), 2767 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 3964 transitions. [2022-12-14 15:29:58,508 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 3964 transitions. Word has length 129 [2022-12-14 15:29:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:58,508 INFO L495 AbstractCegarLoop]: Abstraction has 2768 states and 3964 transitions. [2022-12-14 15:29:58,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 3964 transitions. [2022-12-14 15:29:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 15:29:58,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:58,514 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] [2022-12-14 15:29:58,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:29:58,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1500054635, now seen corresponding path program 1 times [2022-12-14 15:29:58,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:58,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127808447] [2022-12-14 15:29:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:58,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:58,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:58,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127808447] [2022-12-14 15:29:58,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127808447] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:58,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:58,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:29:58,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179925255] [2022-12-14 15:29:58,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:58,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:58,615 INFO L87 Difference]: Start difference. First operand 2768 states and 3964 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) [2022-12-14 15:29:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:59,080 INFO L93 Difference]: Finished difference Result 7508 states and 10750 transitions. [2022-12-14 15:29:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:59,080 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 135 [2022-12-14 15:29:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:59,094 INFO L225 Difference]: With dead ends: 7508 [2022-12-14 15:29:59,094 INFO L226 Difference]: Without dead ends: 4818 [2022-12-14 15:29:59,099 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 [2022-12-14 15:29:59,100 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 160 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 509 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 [2022-12-14 15:29:59,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 509 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2022-12-14 15:29:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 4816. [2022-12-14 15:29:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 4815 states have (on average 1.4145379023883697) internal successors, (6811), 4815 states have internal predecessors, (6811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:29:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6811 transitions. [2022-12-14 15:29:59,606 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6811 transitions. Word has length 135 [2022-12-14 15:29:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:59,606 INFO L495 AbstractCegarLoop]: Abstraction has 4816 states and 6811 transitions. [2022-12-14 15:29:59,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-12-14 15:29:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6811 transitions. [2022-12-14 15:29:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 15:29:59,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:59,615 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, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:59,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:29:59,615 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash -850053840, now seen corresponding path program 1 times [2022-12-14 15:29:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565078333] [2022-12-14 15:29:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:59,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565078333] [2022-12-14 15:29:59,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565078333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:59,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:59,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:29:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814829041] [2022-12-14 15:29:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:59,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:29:59,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:29:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:29:59,816 INFO L87 Difference]: Start difference. First operand 4816 states and 6811 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:01,934 INFO L93 Difference]: Finished difference Result 17185 states and 24155 transitions. [2022-12-14 15:30:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:30:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2022-12-14 15:30:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:01,960 INFO L225 Difference]: With dead ends: 17185 [2022-12-14 15:30:01,960 INFO L226 Difference]: Without dead ends: 12452 [2022-12-14 15:30:01,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:30:01,965 INFO L413 NwaCegarLoop]: 1639 mSDtfsCounter, 1529 mSDsluCounter, 4712 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 6351 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:01,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 6351 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:30:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12452 states. [2022-12-14 15:30:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12452 to 6340. [2022-12-14 15:30:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 1.3847610033128253) internal successors, (8778), 6339 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 8778 transitions. [2022-12-14 15:30:02,627 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 8778 transitions. Word has length 141 [2022-12-14 15:30:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:02,627 INFO L495 AbstractCegarLoop]: Abstraction has 6340 states and 8778 transitions. [2022-12-14 15:30:02,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 8778 transitions. [2022-12-14 15:30:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:30:02,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:02,638 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:02,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:30:02,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash 431477201, now seen corresponding path program 1 times [2022-12-14 15:30:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764539112] [2022-12-14 15:30:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:02,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:02,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764539112] [2022-12-14 15:30:02,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764539112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:02,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:02,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:30:02,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769726945] [2022-12-14 15:30:02,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:02,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:30:02,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:30:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:30:02,960 INFO L87 Difference]: Start difference. First operand 6340 states and 8778 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:03,936 INFO L93 Difference]: Finished difference Result 12599 states and 17460 transitions. [2022-12-14 15:30:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:30:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-12-14 15:30:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:03,954 INFO L225 Difference]: With dead ends: 12599 [2022-12-14 15:30:03,954 INFO L226 Difference]: Without dead ends: 6342 [2022-12-14 15:30:03,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:30:03,960 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 792 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:03,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 1243 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:30:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-12-14 15:30:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 6340. [2022-12-14 15:30:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 1.3841299889572487) internal successors, (8774), 6339 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 8774 transitions. [2022-12-14 15:30:04,626 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 8774 transitions. Word has length 143 [2022-12-14 15:30:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:04,626 INFO L495 AbstractCegarLoop]: Abstraction has 6340 states and 8774 transitions. [2022-12-14 15:30:04,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 8774 transitions. [2022-12-14 15:30:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:30:04,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:04,632 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:04,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:30:04,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash 96562418, now seen corresponding path program 1 times [2022-12-14 15:30:04,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:04,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497198751] [2022-12-14 15:30:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:04,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:04,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:04,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497198751] [2022-12-14 15:30:04,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497198751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:04,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:04,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070082819] [2022-12-14 15:30:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:04,715 INFO L87 Difference]: Start difference. First operand 6340 states and 8774 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:05,866 INFO L93 Difference]: Finished difference Result 15563 states and 21658 transitions. [2022-12-14 15:30:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-12-14 15:30:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:05,879 INFO L225 Difference]: With dead ends: 15563 [2022-12-14 15:30:05,879 INFO L226 Difference]: Without dead ends: 9305 [2022-12-14 15:30:05,884 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 [2022-12-14 15:30:05,885 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 209 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:05,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 584 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:30:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9305 states. [2022-12-14 15:30:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9305 to 9303. [2022-12-14 15:30:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 1.3845409589335627) internal successors, (12879), 9302 states have internal predecessors, (12879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 12879 transitions. [2022-12-14 15:30:06,880 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 12879 transitions. Word has length 143 [2022-12-14 15:30:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:06,880 INFO L495 AbstractCegarLoop]: Abstraction has 9303 states and 12879 transitions. [2022-12-14 15:30:06,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 12879 transitions. [2022-12-14 15:30:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:30:06,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:06,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:06,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:30:06,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash 335840159, now seen corresponding path program 1 times [2022-12-14 15:30:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012907597] [2022-12-14 15:30:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:06,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012907597] [2022-12-14 15:30:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012907597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:06,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:06,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:30:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969178061] [2022-12-14 15:30:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:07,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:30:07,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:30:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:30:07,001 INFO L87 Difference]: Start difference. First operand 9303 states and 12879 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:08,333 INFO L93 Difference]: Finished difference Result 18554 states and 25702 transitions. [2022-12-14 15:30:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:30:08,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-12-14 15:30:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:08,345 INFO L225 Difference]: With dead ends: 18554 [2022-12-14 15:30:08,345 INFO L226 Difference]: Without dead ends: 9303 [2022-12-14 15:30:08,351 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 [2022-12-14 15:30:08,352 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 789 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:08,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 152 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:30:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2022-12-14 15:30:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 9303. [2022-12-14 15:30:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 1.367017845624597) internal successors, (12716), 9302 states have internal predecessors, (12716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 12716 transitions. [2022-12-14 15:30:09,540 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 12716 transitions. Word has length 144 [2022-12-14 15:30:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:09,540 INFO L495 AbstractCegarLoop]: Abstraction has 9303 states and 12716 transitions. [2022-12-14 15:30:09,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 12716 transitions. [2022-12-14 15:30:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:30:09,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:09,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:09,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:30:09,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1160942721, now seen corresponding path program 1 times [2022-12-14 15:30:09,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:09,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113065964] [2022-12-14 15:30:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:09,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:09,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113065964] [2022-12-14 15:30:09,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113065964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:09,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:09,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:30:09,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964884239] [2022-12-14 15:30:09,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:09,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:30:09,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:30:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:30:09,686 INFO L87 Difference]: Start difference. First operand 9303 states and 12716 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:11,060 INFO L93 Difference]: Finished difference Result 18560 states and 25384 transitions. [2022-12-14 15:30:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:30:11,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-12-14 15:30:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:11,072 INFO L225 Difference]: With dead ends: 18560 [2022-12-14 15:30:11,072 INFO L226 Difference]: Without dead ends: 9303 [2022-12-14 15:30:11,077 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 [2022-12-14 15:30:11,078 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 790 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:11,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 144 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:30:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2022-12-14 15:30:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 9303. [2022-12-14 15:30:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 1.339389378628252) internal successors, (12459), 9302 states have internal predecessors, (12459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 12459 transitions. [2022-12-14 15:30:12,353 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 12459 transitions. Word has length 144 [2022-12-14 15:30:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:12,353 INFO L495 AbstractCegarLoop]: Abstraction has 9303 states and 12459 transitions. [2022-12-14 15:30:12,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 12459 transitions. [2022-12-14 15:30:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:30:12,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:12,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:12,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 15:30:12,365 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:12,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1095077985, now seen corresponding path program 1 times [2022-12-14 15:30:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:12,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521434790] [2022-12-14 15:30:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:12,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:12,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521434790] [2022-12-14 15:30:12,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521434790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:12,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:12,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:30:12,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68658958] [2022-12-14 15:30:12,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:12,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:30:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:30:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:30:12,503 INFO L87 Difference]: Start difference. First operand 9303 states and 12459 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:14,214 INFO L93 Difference]: Finished difference Result 18542 states and 24848 transitions. [2022-12-14 15:30:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:30:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-12-14 15:30:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:14,224 INFO L225 Difference]: With dead ends: 18542 [2022-12-14 15:30:14,224 INFO L226 Difference]: Without dead ends: 9303 [2022-12-14 15:30:14,231 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 [2022-12-14 15:30:14,231 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 739 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:14,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 168 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:30:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2022-12-14 15:30:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 9303. [2022-12-14 15:30:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 1.3263814233498172) internal successors, (12338), 9302 states have internal predecessors, (12338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 12338 transitions. [2022-12-14 15:30:15,548 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 12338 transitions. Word has length 144 [2022-12-14 15:30:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:15,548 INFO L495 AbstractCegarLoop]: Abstraction has 9303 states and 12338 transitions. [2022-12-14 15:30:15,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 12338 transitions. [2022-12-14 15:30:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:30:15,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:15,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:15,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:30:15,556 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1809207425, now seen corresponding path program 1 times [2022-12-14 15:30:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:15,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046826932] [2022-12-14 15:30:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:15,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:15,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046826932] [2022-12-14 15:30:15,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046826932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:15,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:15,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:30:15,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638498572] [2022-12-14 15:30:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:15,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:30:15,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:30:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:30:15,652 INFO L87 Difference]: Start difference. First operand 9303 states and 12338 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:17,494 INFO L93 Difference]: Finished difference Result 18530 states and 24591 transitions. [2022-12-14 15:30:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:30:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-12-14 15:30:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:17,503 INFO L225 Difference]: With dead ends: 18530 [2022-12-14 15:30:17,503 INFO L226 Difference]: Without dead ends: 9303 [2022-12-14 15:30:17,508 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 [2022-12-14 15:30:17,508 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 701 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:17,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 184 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:30:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2022-12-14 15:30:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 9303. [2022-12-14 15:30:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 1.3120834229198022) internal successors, (12205), 9302 states have internal predecessors, (12205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 12205 transitions. [2022-12-14 15:30:18,819 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 12205 transitions. Word has length 144 [2022-12-14 15:30:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:18,819 INFO L495 AbstractCegarLoop]: Abstraction has 9303 states and 12205 transitions. [2022-12-14 15:30:18,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 12205 transitions. [2022-12-14 15:30:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:30:18,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:18,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:18,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 15:30:18,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 734873439, now seen corresponding path program 1 times [2022-12-14 15:30:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158083053] [2022-12-14 15:30:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:18,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:19,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:19,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158083053] [2022-12-14 15:30:19,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158083053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:19,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:19,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:30:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61236587] [2022-12-14 15:30:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:30:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:19,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:30:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:30:19,131 INFO L87 Difference]: Start difference. First operand 9303 states and 12205 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:20,523 INFO L93 Difference]: Finished difference Result 16334 states and 21436 transitions. [2022-12-14 15:30:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:30:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-12-14 15:30:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:20,532 INFO L225 Difference]: With dead ends: 16334 [2022-12-14 15:30:20,532 INFO L226 Difference]: Without dead ends: 8834 [2022-12-14 15:30:20,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:30:20,537 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:20,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 754 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:30:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8834 states. [2022-12-14 15:30:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8834 to 8834. [2022-12-14 15:30:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8834 states, 8833 states have (on average 1.29910562662742) internal successors, (11475), 8833 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8834 states to 8834 states and 11475 transitions. [2022-12-14 15:30:21,779 INFO L78 Accepts]: Start accepts. Automaton has 8834 states and 11475 transitions. Word has length 144 [2022-12-14 15:30:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:21,780 INFO L495 AbstractCegarLoop]: Abstraction has 8834 states and 11475 transitions. [2022-12-14 15:30:21,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8834 states and 11475 transitions. [2022-12-14 15:30:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:30:21,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:21,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:21,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 15:30:21,787 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:21,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash -562436503, now seen corresponding path program 1 times [2022-12-14 15:30:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893534141] [2022-12-14 15:30:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:21,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893534141] [2022-12-14 15:30:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893534141] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:21,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:21,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700743255] [2022-12-14 15:30:21,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:21,837 INFO L87 Difference]: Start difference. First operand 8834 states and 11475 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:23,127 INFO L93 Difference]: Finished difference Result 12291 states and 16049 transitions. [2022-12-14 15:30:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-12-14 15:30:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:23,135 INFO L225 Difference]: With dead ends: 12291 [2022-12-14 15:30:23,135 INFO L226 Difference]: Without dead ends: 8196 [2022-12-14 15:30:23,138 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 [2022-12-14 15:30:23,138 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 0 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:23,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 492 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:30:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8196 states. [2022-12-14 15:30:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8196 to 5578. [2022-12-14 15:30:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 5577 states have (on average 1.2811547426932042) internal successors, (7145), 5577 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 7145 transitions. [2022-12-14 15:30:23,959 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 7145 transitions. Word has length 146 [2022-12-14 15:30:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:23,959 INFO L495 AbstractCegarLoop]: Abstraction has 5578 states and 7145 transitions. [2022-12-14 15:30:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 7145 transitions. [2022-12-14 15:30:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:23,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:23,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:23,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 15:30:23,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1264319160, now seen corresponding path program 1 times [2022-12-14 15:30:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:23,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782532905] [2022-12-14 15:30:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:23,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:24,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782532905] [2022-12-14 15:30:24,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782532905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:24,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:24,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271498046] [2022-12-14 15:30:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:24,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:24,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:24,056 INFO L87 Difference]: Start difference. First operand 5578 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:24,782 INFO L93 Difference]: Finished difference Result 9128 states and 11787 transitions. [2022-12-14 15:30:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:24,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:30:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:24,787 INFO L225 Difference]: With dead ends: 9128 [2022-12-14 15:30:24,787 INFO L226 Difference]: Without dead ends: 4208 [2022-12-14 15:30:24,791 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 [2022-12-14 15:30:24,791 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 113 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:24,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 437 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:30:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2022-12-14 15:30:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3920. [2022-12-14 15:30:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 1.2791528451135494) internal successors, (5013), 3919 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 5013 transitions. [2022-12-14 15:30:25,421 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 5013 transitions. Word has length 150 [2022-12-14 15:30:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:25,422 INFO L495 AbstractCegarLoop]: Abstraction has 3920 states and 5013 transitions. [2022-12-14 15:30:25,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 5013 transitions. [2022-12-14 15:30:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:25,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:25,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:25,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 15:30:25,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:25,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1052323097, now seen corresponding path program 1 times [2022-12-14 15:30:25,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:25,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841671101] [2022-12-14 15:30:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:25,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:25,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841671101] [2022-12-14 15:30:25,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841671101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:25,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:25,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402612207] [2022-12-14 15:30:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:25,474 INFO L87 Difference]: Start difference. First operand 3920 states and 5013 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:26,944 INFO L93 Difference]: Finished difference Result 11170 states and 14307 transitions. [2022-12-14 15:30:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:26,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:30:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:26,954 INFO L225 Difference]: With dead ends: 11170 [2022-12-14 15:30:26,954 INFO L226 Difference]: Without dead ends: 7724 [2022-12-14 15:30:26,957 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 [2022-12-14 15:30:26,958 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 166 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:26,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 293 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:30:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7724 states. [2022-12-14 15:30:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7724 to 7722. [2022-12-14 15:30:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 7721 states have (on average 1.2678409532443984) internal successors, (9789), 7721 states have internal predecessors, (9789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 9789 transitions. [2022-12-14 15:30:28,358 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 9789 transitions. Word has length 150 [2022-12-14 15:30:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:28,359 INFO L495 AbstractCegarLoop]: Abstraction has 7722 states and 9789 transitions. [2022-12-14 15:30:28,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 9789 transitions. [2022-12-14 15:30:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:28,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:28,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:28,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 15:30:28,365 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 321214641, now seen corresponding path program 1 times [2022-12-14 15:30:28,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:28,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558649652] [2022-12-14 15:30:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:28,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:28,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558649652] [2022-12-14 15:30:28,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558649652] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:28,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:28,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327112717] [2022-12-14 15:30:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:28,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:28,453 INFO L87 Difference]: Start difference. First operand 7722 states and 9789 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:29,310 INFO L93 Difference]: Finished difference Result 10910 states and 13883 transitions. [2022-12-14 15:30:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:30:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:29,315 INFO L225 Difference]: With dead ends: 10910 [2022-12-14 15:30:29,315 INFO L226 Difference]: Without dead ends: 4070 [2022-12-14 15:30:29,319 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 [2022-12-14 15:30:29,319 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:29,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 430 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:30:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2022-12-14 15:30:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 4068. [2022-12-14 15:30:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 4067 states have (on average 1.2507991148266535) internal successors, (5087), 4067 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 5087 transitions. [2022-12-14 15:30:30,005 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 5087 transitions. Word has length 150 [2022-12-14 15:30:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:30,005 INFO L495 AbstractCegarLoop]: Abstraction has 4068 states and 5087 transitions. [2022-12-14 15:30:30,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 5087 transitions. [2022-12-14 15:30:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:30,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:30,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:30,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 15:30:30,008 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1842999718, now seen corresponding path program 1 times [2022-12-14 15:30:30,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029827691] [2022-12-14 15:30:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:30,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029827691] [2022-12-14 15:30:30,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029827691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:30,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:30,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948704018] [2022-12-14 15:30:30,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:30,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:30,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:30,120 INFO L87 Difference]: Start difference. First operand 4068 states and 5087 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:30,646 INFO L93 Difference]: Finished difference Result 5652 states and 7097 transitions. [2022-12-14 15:30:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:30:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:30,648 INFO L225 Difference]: With dead ends: 5652 [2022-12-14 15:30:30,648 INFO L226 Difference]: Without dead ends: 2178 [2022-12-14 15:30:30,650 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 [2022-12-14 15:30:30,651 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 78 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:30,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 424 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:30:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-12-14 15:30:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2176. [2022-12-14 15:30:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.2317241379310344) internal successors, (2679), 2175 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2679 transitions. [2022-12-14 15:30:31,020 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2679 transitions. Word has length 150 [2022-12-14 15:30:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:31,020 INFO L495 AbstractCegarLoop]: Abstraction has 2176 states and 2679 transitions. [2022-12-14 15:30:31,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2679 transitions. [2022-12-14 15:30:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:31,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:31,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 15:30:31,022 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1779829667, now seen corresponding path program 1 times [2022-12-14 15:30:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:31,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676241924] [2022-12-14 15:30:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:31,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:31,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676241924] [2022-12-14 15:30:31,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676241924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:31,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:31,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:31,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486817540] [2022-12-14 15:30:31,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:31,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:31,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:31,071 INFO L87 Difference]: Start difference. First operand 2176 states and 2679 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:32,226 INFO L93 Difference]: Finished difference Result 5992 states and 7391 transitions. [2022-12-14 15:30:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:30:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:32,230 INFO L225 Difference]: With dead ends: 5992 [2022-12-14 15:30:32,230 INFO L226 Difference]: Without dead ends: 4238 [2022-12-14 15:30:32,232 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 [2022-12-14 15:30:32,233 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 142 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:32,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 290 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:30:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2022-12-14 15:30:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 4236. [2022-12-14 15:30:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 4235 states have (on average 1.220543093270366) internal successors, (5169), 4235 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 5169 transitions. [2022-12-14 15:30:32,987 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 5169 transitions. Word has length 150 [2022-12-14 15:30:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:32,988 INFO L495 AbstractCegarLoop]: Abstraction has 4236 states and 5169 transitions. [2022-12-14 15:30:32,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 5169 transitions. [2022-12-14 15:30:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:32,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:32,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 15:30:32,990 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1276967315, now seen corresponding path program 1 times [2022-12-14 15:30:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927612794] [2022-12-14 15:30:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:30:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:30:33,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:30:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927612794] [2022-12-14 15:30:33,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927612794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:33,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:30:33,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:30:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164238221] [2022-12-14 15:30:33,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:33,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:30:33,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:30:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:30:33,079 INFO L87 Difference]: Start difference. First operand 4236 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:30:33,591 INFO L93 Difference]: Finished difference Result 5776 states and 7075 transitions. [2022-12-14 15:30:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:30:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:30:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:30:33,594 INFO L225 Difference]: With dead ends: 5776 [2022-12-14 15:30:33,594 INFO L226 Difference]: Without dead ends: 2286 [2022-12-14 15:30:33,596 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 [2022-12-14 15:30:33,596 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 59 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:30:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 417 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:30:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-12-14 15:30:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2284. [2022-12-14 15:30:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 1.1988611476127902) internal successors, (2737), 2283 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2737 transitions. [2022-12-14 15:30:34,004 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2737 transitions. Word has length 150 [2022-12-14 15:30:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:30:34,004 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 2737 transitions. [2022-12-14 15:30:34,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:30:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2737 transitions. [2022-12-14 15:30:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:30:34,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:30:34,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:30:34,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 15:30:34,006 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:30:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:30:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 161619127, now seen corresponding path program 1 times [2022-12-14 15:30:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:30:34,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274673575] [2022-12-14 15:30:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:30:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:30:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:32:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:32:31,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:32:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274673575] [2022-12-14 15:32:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274673575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:32:31,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:32:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-12-14 15:32:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262253919] [2022-12-14 15:32:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:32:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 15:32:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:32:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 15:32:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=4036, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 15:32:31,249 INFO L87 Difference]: Start difference. First operand 2284 states and 2737 transitions. Second operand has 68 states, 68 states have (on average 2.2058823529411766) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:21,263 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 443 DAG size of output: 422 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:34:34,267 WARN L233 SmtUtils]: Spent 12.00s on a formula simplification. DAG size of input: 477 DAG size of output: 452 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:34:45,860 WARN L233 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 445 DAG size of output: 424 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:34:59,477 WARN L233 SmtUtils]: Spent 12.49s on a formula simplification. DAG size of input: 479 DAG size of output: 454 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:35:18,844 WARN L233 SmtUtils]: Spent 18.50s on a formula simplification. DAG size of input: 518 DAG size of output: 487 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:35:39,923 WARN L233 SmtUtils]: Spent 19.85s on a formula simplification. DAG size of input: 545 DAG size of output: 510 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:36:01,664 WARN L233 SmtUtils]: Spent 20.16s on a formula simplification. DAG size of input: 520 DAG size of output: 489 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:36:22,974 WARN L233 SmtUtils]: Spent 20.26s on a formula simplification. DAG size of input: 547 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:36:44,486 WARN L233 SmtUtils]: Spent 20.61s on a formula simplification. DAG size of input: 564 DAG size of output: 527 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:37:08,472 WARN L233 SmtUtils]: Spent 21.93s on a formula simplification. DAG size of input: 566 DAG size of output: 529 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:37:33,510 WARN L233 SmtUtils]: Spent 23.57s on a formula simplification. DAG size of input: 598 DAG size of output: 561 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:38:01,328 WARN L233 SmtUtils]: Spent 26.09s on a formula simplification. DAG size of input: 628 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:38:28,115 WARN L233 SmtUtils]: Spent 23.52s on a formula simplification. DAG size of input: 600 DAG size of output: 563 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:38:58,587 WARN L233 SmtUtils]: Spent 28.99s on a formula simplification. DAG size of input: 630 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:39:30,098 WARN L233 SmtUtils]: Spent 30.16s on a formula simplification. DAG size of input: 689 DAG size of output: 651 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:39:38,163 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 436 DAG size of output: 421 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:39:44,404 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 413 DAG size of output: 397 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:40:17,305 WARN L233 SmtUtils]: Spent 31.24s on a formula simplification. DAG size of input: 691 DAG size of output: 653 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:40:24,593 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 438 DAG size of output: 420 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:40:30,885 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 415 DAG size of output: 396 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:40:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:42,593 INFO L93 Difference]: Finished difference Result 3643 states and 4352 transitions. [2022-12-14 15:40:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 15:40:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2058823529411766) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:40:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:42,595 INFO L225 Difference]: With dead ends: 3643 [2022-12-14 15:40:42,595 INFO L226 Difference]: Without dead ends: 1553 [2022-12-14 15:40:42,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 486.2s TimeCoverageRelationStatistics Valid=3299, Invalid=19351, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 15:40:42,600 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 3412 mSDsluCounter, 4384 mSDsCounter, 0 mSdLazyCounter, 10564 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3412 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 10614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 10564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:42,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3412 Valid, 4560 Invalid, 10614 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 10564 Invalid, 0 Unknown, 0 Unchecked, 37.2s Time] [2022-12-14 15:40:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-12-14 15:40:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 918. [2022-12-14 15:40:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.1777535441657578) internal successors, (1080), 917 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1080 transitions. [2022-12-14 15:40:43,069 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1080 transitions. Word has length 150 [2022-12-14 15:40:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:43,069 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1080 transitions. [2022-12-14 15:40:43,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2058823529411766) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1080 transitions. [2022-12-14 15:40:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:40:43,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:43,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:43,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 15:40:43,070 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash -763269296, now seen corresponding path program 1 times [2022-12-14 15:40:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:43,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393540681] [2022-12-14 15:40:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:43,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:43,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393540681] [2022-12-14 15:40:43,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393540681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:43,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:43,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544155158] [2022-12-14 15:40:43,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:43,146 INFO L87 Difference]: Start difference. First operand 918 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:43,584 INFO L93 Difference]: Finished difference Result 1158 states and 1368 transitions. [2022-12-14 15:40:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 15:40:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:43,585 INFO L225 Difference]: With dead ends: 1158 [2022-12-14 15:40:43,585 INFO L226 Difference]: Without dead ends: 614 [2022-12-14 15:40:43,585 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 [2022-12-14 15:40:43,586 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 43 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:43,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 399 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:40:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-12-14 15:40:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 612. [2022-12-14 15:40:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 1.1456628477905073) internal successors, (700), 611 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 700 transitions. [2022-12-14 15:40:43,974 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 700 transitions. Word has length 150 [2022-12-14 15:40:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:43,975 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 700 transitions. [2022-12-14 15:40:43,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 700 transitions. [2022-12-14 15:40:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:40:43,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:43,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:43,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 15:40:43,976 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash 354583625, now seen corresponding path program 1 times [2022-12-14 15:40:43,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:43,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268773200] [2022-12-14 15:40:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:44,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:44,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268773200] [2022-12-14 15:40:44,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268773200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:44,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:44,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618721233] [2022-12-14 15:40:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:44,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:44,015 INFO L87 Difference]: Start difference. First operand 612 states and 700 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:44,658 INFO L93 Difference]: Finished difference Result 976 states and 1127 transitions. [2022-12-14 15:40:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 15:40:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:44,659 INFO L225 Difference]: With dead ends: 976 [2022-12-14 15:40:44,659 INFO L226 Difference]: Without dead ends: 604 [2022-12-14 15:40:44,659 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 [2022-12-14 15:40:44,660 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 112 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 207 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:40:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-12-14 15:40:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-12-14 15:40:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.1310116086235489) internal successors, (682), 603 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 682 transitions. [2022-12-14 15:40:45,042 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 682 transitions. Word has length 151 [2022-12-14 15:40:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:45,042 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 682 transitions. [2022-12-14 15:40:45,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 682 transitions. [2022-12-14 15:40:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:40:45,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:45,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:45,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 15:40:45,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash -759700515, now seen corresponding path program 1 times [2022-12-14 15:40:45,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:45,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483308777] [2022-12-14 15:40:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:45,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483308777] [2022-12-14 15:40:45,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483308777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:45,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:45,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:45,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630846497] [2022-12-14 15:40:45,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:45,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:45,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:45,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:45,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:45,083 INFO L87 Difference]: Start difference. First operand 604 states and 682 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:45,557 INFO L93 Difference]: Finished difference Result 1052 states and 1196 transitions. [2022-12-14 15:40:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 15:40:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:45,559 INFO L225 Difference]: With dead ends: 1052 [2022-12-14 15:40:45,559 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 15:40:45,559 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 [2022-12-14 15:40:45,560 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 136 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:45,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:40:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 15:40:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 15:40:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.1167247386759582) internal successors, (641), 574 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 641 transitions. [2022-12-14 15:40:46,110 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 641 transitions. Word has length 151 [2022-12-14 15:40:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:46,110 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 641 transitions. [2022-12-14 15:40:46,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 641 transitions. [2022-12-14 15:40:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:40:46,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:46,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 15:40:46,111 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash -797543656, now seen corresponding path program 1 times [2022-12-14 15:40:46,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:46,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010902110] [2022-12-14 15:40:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:46,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:46,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010902110] [2022-12-14 15:40:46,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010902110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:46,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:46,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648461961] [2022-12-14 15:40:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:46,153 INFO L87 Difference]: Start difference. First operand 575 states and 641 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:46,657 INFO L93 Difference]: Finished difference Result 913 states and 1026 transitions. [2022-12-14 15:40:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 15:40:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:46,658 INFO L225 Difference]: With dead ends: 913 [2022-12-14 15:40:46,658 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 15:40:46,659 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 [2022-12-14 15:40:46,659 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:46,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 175 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:40:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 15:40:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-12-14 15:40:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.1007067137809188) internal successors, (623), 566 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 623 transitions. [2022-12-14 15:40:47,085 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 623 transitions. Word has length 151 [2022-12-14 15:40:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:47,085 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 623 transitions. [2022-12-14 15:40:47,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 623 transitions. [2022-12-14 15:40:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:40:47,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:47,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 15:40:47,086 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1235547820, now seen corresponding path program 1 times [2022-12-14 15:40:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:47,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844026928] [2022-12-14 15:40:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:47,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:47,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844026928] [2022-12-14 15:40:47,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844026928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:47,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:47,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740483143] [2022-12-14 15:40:47,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:47,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:47,127 INFO L87 Difference]: Start difference. First operand 567 states and 623 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:47,567 INFO L93 Difference]: Finished difference Result 919 states and 1016 transitions. [2022-12-14 15:40:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 15:40:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:47,568 INFO L225 Difference]: With dead ends: 919 [2022-12-14 15:40:47,568 INFO L226 Difference]: Without dead ends: 559 [2022-12-14 15:40:47,568 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 [2022-12-14 15:40:47,569 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 91 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:47,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 200 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:40:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-12-14 15:40:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2022-12-14 15:40:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.0842293906810037) internal successors, (605), 558 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) [2022-12-14 15:40:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 605 transitions. [2022-12-14 15:40:47,911 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 605 transitions. Word has length 151 [2022-12-14 15:40:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:47,912 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 605 transitions. [2022-12-14 15:40:47,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 605 transitions. [2022-12-14 15:40:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:40:47,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:47,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 15:40:47,912 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 166810753, now seen corresponding path program 1 times [2022-12-14 15:40:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:47,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593153647] [2022-12-14 15:40:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:47,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:47,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593153647] [2022-12-14 15:40:47,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593153647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:47,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:47,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332592005] [2022-12-14 15:40:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:47,952 INFO L87 Difference]: Start difference. First operand 559 states and 605 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:48,382 INFO L93 Difference]: Finished difference Result 915 states and 996 transitions. [2022-12-14 15:40:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 15:40:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:48,383 INFO L225 Difference]: With dead ends: 915 [2022-12-14 15:40:48,383 INFO L226 Difference]: Without dead ends: 551 [2022-12-14 15:40:48,383 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 [2022-12-14 15:40:48,384 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 76 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:48,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 211 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:40:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-14 15:40:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-12-14 15:40:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.0672727272727274) internal successors, (587), 550 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 587 transitions. [2022-12-14 15:40:48,713 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 587 transitions. Word has length 151 [2022-12-14 15:40:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:48,713 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 587 transitions. [2022-12-14 15:40:48,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 587 transitions. [2022-12-14 15:40:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:40:48,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:48,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:48,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 15:40:48,714 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1956352898, now seen corresponding path program 1 times [2022-12-14 15:40:48,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:48,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021297616] [2022-12-14 15:40:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:40:48,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:48,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021297616] [2022-12-14 15:40:48,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021297616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:48,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:40:48,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:40:48,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198052448] [2022-12-14 15:40:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:48,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:40:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:40:48,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:40:48,753 INFO L87 Difference]: Start difference. First operand 551 states and 587 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:40:49,084 INFO L93 Difference]: Finished difference Result 858 states and 922 transitions. [2022-12-14 15:40:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:40:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 15:40:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:40:49,085 INFO L225 Difference]: With dead ends: 858 [2022-12-14 15:40:49,085 INFO L226 Difference]: Without dead ends: 407 [2022-12-14 15:40:49,086 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 [2022-12-14 15:40:49,086 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 102 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:40:49,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 220 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:40:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-14 15:40:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-12-14 15:40:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.0591133004926108) internal successors, (430), 406 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 430 transitions. [2022-12-14 15:40:49,303 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 430 transitions. Word has length 151 [2022-12-14 15:40:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:40:49,303 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 430 transitions. [2022-12-14 15:40:49,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:40:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 430 transitions. [2022-12-14 15:40:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 15:40:49,304 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:40:49,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:40:49,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 15:40:49,304 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:40:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:40:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash -203648846, now seen corresponding path program 1 times [2022-12-14 15:40:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:40:49,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369721181] [2022-12-14 15:40:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:40:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat