./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS --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 f3ccdaf8a38fa71f45ae8f9c954b264f54c9fdca890d307be3771e824a47b3d8 --- 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-8393723 [2022-11-19 06:45:45,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:45:45,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:45:45,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:45:45,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:45:45,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:45:45,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:45:45,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:45:45,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:45:45,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:45:45,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:45:45,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:45:45,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:45:45,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:45:45,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:45:45,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:45:45,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:45:45,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:45:45,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:45:45,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:45:45,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:45:45,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:45:45,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:45:45,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:45:45,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:45:45,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:45:45,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:45:45,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:45:45,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:45:45,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:45:45,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:45:45,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:45:45,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:45:45,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:45:45,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:45:45,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:45:45,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:45:45,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:45:45,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:45:45,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:45:45,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:45:45,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:45:45,933 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:45:45,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:45:45,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:45:45,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:45:45,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:45:45,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:45:45,935 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:45:45,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:45:45,936 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:45:45,936 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:45:45,938 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:45:45,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:45:45,938 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:45:45,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:45:45,939 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:45:45,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:45:45,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:45:45,940 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:45:45,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:45:45,941 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:45:45,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:45:45,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:45:45,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:45:45,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:45:45,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:45:45,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:45:45,943 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:45:45,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:45:45,943 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:45:45,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:45:45,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:45:45,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:45:45,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:45:45,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:45:45,945 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:45:45,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:45:45,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:45:45,946 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:45:45,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:45:45,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:45:45,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:45:45,947 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_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3ccdaf8a38fa71f45ae8f9c954b264f54c9fdca890d307be3771e824a47b3d8 [2022-11-19 06:45:46,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:45:46,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:45:46,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:45:46,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:45:46,286 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:45:46,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2022-11-19 06:45:46,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/data/e98e7df31/b4a0430099ba443f99850f592e1f1244/FLAG5ebb50efc [2022-11-19 06:45:46,938 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:45:46,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2022-11-19 06:45:46,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/data/e98e7df31/b4a0430099ba443f99850f592e1f1244/FLAG5ebb50efc [2022-11-19 06:45:47,183 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/data/e98e7df31/b4a0430099ba443f99850f592e1f1244 [2022-11-19 06:45:47,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:45:47,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:45:47,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:45:47,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:45:47,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:45:47,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:45:47" (1/1) ... [2022-11-19 06:45:47,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4efa69ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:47, skipping insertion in model container [2022-11-19 06:45:47,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:45:47" (1/1) ... [2022-11-19 06:45:47,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:45:47,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:45:47,863 WARN L234 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_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[23233,23246] [2022-11-19 06:45:48,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:45:48,123 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:45:48,362 WARN L234 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_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[23233,23246] [2022-11-19 06:45:48,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:45:48,477 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:45:48,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48 WrapperNode [2022-11-19 06:45:48,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:45:48,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:45:48,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:45:48,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:45:48,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,614 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2878 [2022-11-19 06:45:48,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:45:48,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:45:48,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:45:48,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:45:48,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:45:48,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:45:48,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:45:48,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:45:48,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (1/1) ... [2022-11-19 06:45:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:45:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:45:48,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:45:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c4f900-3fd4-4e96-9d9f-860b02cbc5f3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:45:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:45:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:45:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:45:48,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:45:49,161 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:45:49,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:45:51,186 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:45:51,905 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:45:51,905 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 06:45:51,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:45:51 BoogieIcfgContainer [2022-11-19 06:45:51,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:45:51,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:45:51,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:45:51,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:45:51,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:45:47" (1/3) ... [2022-11-19 06:45:51,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0591b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:45:51, skipping insertion in model container [2022-11-19 06:45:51,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:45:48" (2/3) ... [2022-11-19 06:45:51,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0591b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:45:51, skipping insertion in model container [2022-11-19 06:45:51,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:45:51" (3/3) ... [2022-11-19 06:45:51,923 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2022-11-19 06:45:51,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:45:51,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:45:52,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:45:52,044 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;@a496bc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:45:52,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:45:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 647 states, 645 states have (on average 1.7302325581395348) internal successors, (1116), 646 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-19 06:45:52,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:52,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:52,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1415635360, now seen corresponding path program 1 times [2022-11-19 06:45:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:52,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074418380] [2022-11-19 06:45:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:52,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074418380] [2022-11-19 06:45:52,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074418380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:52,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:52,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013742635] [2022-11-19 06:45:52,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:52,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:53,037 INFO L87 Difference]: Start difference. First operand has 647 states, 645 states have (on average 1.7302325581395348) internal successors, (1116), 646 states have internal predecessors, (1116), 0 states have call successors, (0), 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 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:53,376 INFO L93 Difference]: Finished difference Result 941 states and 1599 transitions. [2022-11-19 06:45:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 202 [2022-11-19 06:45:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:53,400 INFO L225 Difference]: With dead ends: 941 [2022-11-19 06:45:53,401 INFO L226 Difference]: Without dead ends: 777 [2022-11-19 06:45:53,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:53,416 INFO L413 NwaCegarLoop]: 1255 mSDtfsCounter, 269 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:53,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 2236 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-19 06:45:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 775. [2022-11-19 06:45:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 1.6304909560723515) internal successors, (1262), 774 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1262 transitions. [2022-11-19 06:45:53,523 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1262 transitions. Word has length 202 [2022-11-19 06:45:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:53,524 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1262 transitions. [2022-11-19 06:45:53,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1262 transitions. [2022-11-19 06:45:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-19 06:45:53,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:53,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:53,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:45:53,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1248854014, now seen corresponding path program 1 times [2022-11-19 06:45:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875828269] [2022-11-19 06:45:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:54,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:54,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875828269] [2022-11-19 06:45:54,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875828269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:54,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:54,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91144356] [2022-11-19 06:45:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:54,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:54,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:54,083 INFO L87 Difference]: Start difference. First operand 775 states and 1262 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:54,366 INFO L93 Difference]: Finished difference Result 1222 states and 1997 transitions. [2022-11-19 06:45:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2022-11-19 06:45:54,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:54,377 INFO L225 Difference]: With dead ends: 1222 [2022-11-19 06:45:54,377 INFO L226 Difference]: Without dead ends: 934 [2022-11-19 06:45:54,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:54,389 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 251 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:54,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1897 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-11-19 06:45:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 932. [2022-11-19 06:45:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 1.6294307196562836) internal successors, (1517), 931 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1517 transitions. [2022-11-19 06:45:54,462 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1517 transitions. Word has length 204 [2022-11-19 06:45:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:54,464 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1517 transitions. [2022-11-19 06:45:54,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1517 transitions. [2022-11-19 06:45:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-19 06:45:54,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:54,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:45:54,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:54,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1388078531, now seen corresponding path program 1 times [2022-11-19 06:45:54,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:54,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12578301] [2022-11-19 06:45:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:54,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:54,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:54,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12578301] [2022-11-19 06:45:54,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12578301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:54,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:54,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406154666] [2022-11-19 06:45:54,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:54,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:54,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:54,789 INFO L87 Difference]: Start difference. First operand 932 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:55,075 INFO L93 Difference]: Finished difference Result 1740 states and 2844 transitions. [2022-11-19 06:45:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-11-19 06:45:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:55,083 INFO L225 Difference]: With dead ends: 1740 [2022-11-19 06:45:55,084 INFO L226 Difference]: Without dead ends: 1297 [2022-11-19 06:45:55,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:55,092 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 249 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:55,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2064 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-11-19 06:45:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1295. [2022-11-19 06:45:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 1.6321483771251932) internal successors, (2112), 1294 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2112 transitions. [2022-11-19 06:45:55,166 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2112 transitions. Word has length 208 [2022-11-19 06:45:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:55,166 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 2112 transitions. [2022-11-19 06:45:55,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2112 transitions. [2022-11-19 06:45:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 06:45:55,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:55,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:55,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:45:55,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1780624144, now seen corresponding path program 1 times [2022-11-19 06:45:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:55,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834327143] [2022-11-19 06:45:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:55,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:55,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:55,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834327143] [2022-11-19 06:45:55,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834327143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:55,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:55,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:55,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126337619] [2022-11-19 06:45:55,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:55,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:55,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:55,412 INFO L87 Difference]: Start difference. First operand 1295 states and 2112 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:55,709 INFO L93 Difference]: Finished difference Result 2572 states and 4207 transitions. [2022-11-19 06:45:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2022-11-19 06:45:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:55,717 INFO L225 Difference]: With dead ends: 2572 [2022-11-19 06:45:55,717 INFO L226 Difference]: Without dead ends: 1766 [2022-11-19 06:45:55,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:55,724 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 248 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:55,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1913 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-11-19 06:45:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1764. [2022-11-19 06:45:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 1.6335791264889392) internal successors, (2880), 1763 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2880 transitions. [2022-11-19 06:45:55,825 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2880 transitions. Word has length 210 [2022-11-19 06:45:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:55,826 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2880 transitions. [2022-11-19 06:45:55,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2880 transitions. [2022-11-19 06:45:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-19 06:45:55,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:55,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:55,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:45:55,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1676151147, now seen corresponding path program 1 times [2022-11-19 06:45:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:55,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981489681] [2022-11-19 06:45:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:56,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981489681] [2022-11-19 06:45:56,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981489681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:56,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:56,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:56,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606022168] [2022-11-19 06:45:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:56,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:56,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:56,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:56,090 INFO L87 Difference]: Start difference. First operand 1764 states and 2880 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:56,553 INFO L93 Difference]: Finished difference Result 4024 states and 6587 transitions. [2022-11-19 06:45:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2022-11-19 06:45:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:56,564 INFO L225 Difference]: With dead ends: 4024 [2022-11-19 06:45:56,565 INFO L226 Difference]: Without dead ends: 2777 [2022-11-19 06:45:56,568 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 [2022-11-19 06:45:56,568 INFO L413 NwaCegarLoop]: 1093 mSDtfsCounter, 241 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:56,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 2020 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-11-19 06:45:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2775. [2022-11-19 06:45:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 1.6330209084354723) internal successors, (4530), 2774 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 4530 transitions. [2022-11-19 06:45:56,843 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 4530 transitions. Word has length 214 [2022-11-19 06:45:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:56,844 INFO L495 AbstractCegarLoop]: Abstraction has 2775 states and 4530 transitions. [2022-11-19 06:45:56,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 4530 transitions. [2022-11-19 06:45:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-19 06:45:56,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:56,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:56,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:45:56,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:56,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1687278263, now seen corresponding path program 1 times [2022-11-19 06:45:56,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:56,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854905025] [2022-11-19 06:45:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:56,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:57,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:57,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854905025] [2022-11-19 06:45:57,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854905025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:57,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:57,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:57,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003629973] [2022-11-19 06:45:57,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:57,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:57,116 INFO L87 Difference]: Start difference. First operand 2775 states and 4530 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:57,669 INFO L93 Difference]: Finished difference Result 6308 states and 10318 transitions. [2022-11-19 06:45:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2022-11-19 06:45:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:57,684 INFO L225 Difference]: With dead ends: 6308 [2022-11-19 06:45:57,684 INFO L226 Difference]: Without dead ends: 4050 [2022-11-19 06:45:57,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:57,688 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 240 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:57,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1915 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-11-19 06:45:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 4048. [2022-11-19 06:45:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 4047 states have (on average 1.633555720286632) internal successors, (6611), 4047 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 6611 transitions. [2022-11-19 06:45:58,013 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 6611 transitions. Word has length 216 [2022-11-19 06:45:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:58,014 INFO L495 AbstractCegarLoop]: Abstraction has 4048 states and 6611 transitions. [2022-11-19 06:45:58,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 6611 transitions. [2022-11-19 06:45:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-19 06:45:58,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:58,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:58,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:45:58,019 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1054176882, now seen corresponding path program 1 times [2022-11-19 06:45:58,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:58,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903090995] [2022-11-19 06:45:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:58,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:58,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:58,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903090995] [2022-11-19 06:45:58,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903090995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:58,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:58,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:58,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570479844] [2022-11-19 06:45:58,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:58,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:58,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:58,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:58,231 INFO L87 Difference]: Start difference. First operand 4048 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:59,001 INFO L93 Difference]: Finished difference Result 10352 states and 16918 transitions. [2022-11-19 06:45:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2022-11-19 06:45:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:59,030 INFO L225 Difference]: With dead ends: 10352 [2022-11-19 06:45:59,030 INFO L226 Difference]: Without dead ends: 6849 [2022-11-19 06:45:59,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:59,037 INFO L413 NwaCegarLoop]: 1048 mSDtfsCounter, 233 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:59,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1976 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:45:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2022-11-19 06:45:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6847. [2022-11-19 06:45:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 6846 states have (on average 1.6295647093193106) internal successors, (11156), 6846 states have internal predecessors, (11156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 11156 transitions. [2022-11-19 06:45:59,794 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 11156 transitions. Word has length 220 [2022-11-19 06:45:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:59,795 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 11156 transitions. [2022-11-19 06:45:59,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:45:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 11156 transitions. [2022-11-19 06:45:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-19 06:45:59,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:59,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:59,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:45:59,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash 773789558, now seen corresponding path program 1 times [2022-11-19 06:45:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:59,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912442942] [2022-11-19 06:45:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:00,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:00,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912442942] [2022-11-19 06:46:00,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912442942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:00,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:00,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:46:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755465524] [2022-11-19 06:46:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:46:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:46:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:46:00,033 INFO L87 Difference]: Start difference. First operand 6847 states and 11156 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:01,060 INFO L93 Difference]: Finished difference Result 16680 states and 27213 transitions. [2022-11-19 06:46:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:46:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2022-11-19 06:46:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:01,119 INFO L225 Difference]: With dead ends: 16680 [2022-11-19 06:46:01,120 INFO L226 Difference]: Without dead ends: 10378 [2022-11-19 06:46:01,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:46:01,129 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 232 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:01,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1917 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:46:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10378 states. [2022-11-19 06:46:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10378 to 10376. [2022-11-19 06:46:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10376 states, 10375 states have (on average 1.6294939759036144) internal successors, (16906), 10375 states have internal predecessors, (16906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10376 states to 10376 states and 16906 transitions. [2022-11-19 06:46:02,052 INFO L78 Accepts]: Start accepts. Automaton has 10376 states and 16906 transitions. Word has length 222 [2022-11-19 06:46:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:02,054 INFO L495 AbstractCegarLoop]: Abstraction has 10376 states and 16906 transitions. [2022-11-19 06:46:02,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10376 states and 16906 transitions. [2022-11-19 06:46:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-19 06:46:02,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:02,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:02,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:46:02,060 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1910534011, now seen corresponding path program 1 times [2022-11-19 06:46:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849803632] [2022-11-19 06:46:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:02,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849803632] [2022-11-19 06:46:02,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849803632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:02,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:02,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:46:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868432183] [2022-11-19 06:46:02,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:02,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:46:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:46:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:46:02,270 INFO L87 Difference]: Start difference. First operand 10376 states and 16906 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:04,348 INFO L93 Difference]: Finished difference Result 27876 states and 45393 transitions. [2022-11-19 06:46:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:46:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2022-11-19 06:46:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:04,402 INFO L225 Difference]: With dead ends: 27876 [2022-11-19 06:46:04,402 INFO L226 Difference]: Without dead ends: 18073 [2022-11-19 06:46:04,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:46:04,419 INFO L413 NwaCegarLoop]: 1003 mSDtfsCounter, 225 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:04,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1932 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:46:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18073 states. [2022-11-19 06:46:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18073 to 18071. [2022-11-19 06:46:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18071 states, 18070 states have (on average 1.6229109020475927) internal successors, (29326), 18070 states have internal predecessors, (29326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18071 states to 18071 states and 29326 transitions. [2022-11-19 06:46:05,895 INFO L78 Accepts]: Start accepts. Automaton has 18071 states and 29326 transitions. Word has length 226 [2022-11-19 06:46:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:05,896 INFO L495 AbstractCegarLoop]: Abstraction has 18071 states and 29326 transitions. [2022-11-19 06:46:05,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 18071 states and 29326 transitions. [2022-11-19 06:46:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-19 06:46:05,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:05,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:46:05,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1949588688, now seen corresponding path program 1 times [2022-11-19 06:46:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130695101] [2022-11-19 06:46:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:06,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130695101] [2022-11-19 06:46:06,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130695101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:06,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:06,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:46:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783096431] [2022-11-19 06:46:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:46:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:46:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:46:06,153 INFO L87 Difference]: Start difference. First operand 18071 states and 29326 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:08,355 INFO L93 Difference]: Finished difference Result 45400 states and 73760 transitions. [2022-11-19 06:46:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:46:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2022-11-19 06:46:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:08,452 INFO L225 Difference]: With dead ends: 45400 [2022-11-19 06:46:08,452 INFO L226 Difference]: Without dead ends: 27902 [2022-11-19 06:46:08,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:46:08,478 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 224 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1919 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:46:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27902 states. [2022-11-19 06:46:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27902 to 27900. [2022-11-19 06:46:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27900 states, 27899 states have (on average 1.6227463349940858) internal successors, (45273), 27899 states have internal predecessors, (45273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27900 states to 27900 states and 45273 transitions. [2022-11-19 06:46:11,162 INFO L78 Accepts]: Start accepts. Automaton has 27900 states and 45273 transitions. Word has length 228 [2022-11-19 06:46:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:11,163 INFO L495 AbstractCegarLoop]: Abstraction has 27900 states and 45273 transitions. [2022-11-19 06:46:11,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 27900 states and 45273 transitions. [2022-11-19 06:46:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-19 06:46:11,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:11,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:11,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:46:11,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1283826795, now seen corresponding path program 1 times [2022-11-19 06:46:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:11,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500693211] [2022-11-19 06:46:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:11,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500693211] [2022-11-19 06:46:11,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500693211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:11,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:11,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 06:46:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817102589] [2022-11-19 06:46:11,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:11,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:46:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:11,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:46:11,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:46:11,723 INFO L87 Difference]: Start difference. First operand 27900 states and 45273 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:16,037 INFO L93 Difference]: Finished difference Result 68888 states and 111684 transitions. [2022-11-19 06:46:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:46:16,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2022-11-19 06:46:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:16,144 INFO L225 Difference]: With dead ends: 68888 [2022-11-19 06:46:16,144 INFO L226 Difference]: Without dead ends: 41589 [2022-11-19 06:46:16,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:46:16,178 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 2466 mSDsluCounter, 9397 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 10392 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:16,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2466 Valid, 10392 Invalid, 811 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:46:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41589 states. [2022-11-19 06:46:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41589 to 41571. [2022-11-19 06:46:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6159008900649507) internal successors, (67173), 41570 states have internal predecessors, (67173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 67173 transitions. [2022-11-19 06:46:19,313 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 67173 transitions. Word has length 232 [2022-11-19 06:46:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:19,314 INFO L495 AbstractCegarLoop]: Abstraction has 41571 states and 67173 transitions. [2022-11-19 06:46:19,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 67173 transitions. [2022-11-19 06:46:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-19 06:46:19,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:19,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:19,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:46:19,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1215544706, now seen corresponding path program 1 times [2022-11-19 06:46:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746750919] [2022-11-19 06:46:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:19,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:19,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746750919] [2022-11-19 06:46:19,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746750919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:19,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:19,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:46:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590733910] [2022-11-19 06:46:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:19,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:46:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:46:19,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:46:19,553 INFO L87 Difference]: Start difference. First operand 41571 states and 67173 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:22,746 INFO L93 Difference]: Finished difference Result 82543 states and 133382 transitions. [2022-11-19 06:46:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:46:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2022-11-19 06:46:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:22,837 INFO L225 Difference]: With dead ends: 82543 [2022-11-19 06:46:22,837 INFO L226 Difference]: Without dead ends: 41573 [2022-11-19 06:46:22,881 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 [2022-11-19 06:46:22,881 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 478 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:22,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 2882 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:46:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2022-11-19 06:46:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2022-11-19 06:46:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6135915323550638) internal successors, (67077), 41570 states have internal predecessors, (67077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 67077 transitions. [2022-11-19 06:46:26,120 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 67077 transitions. Word has length 233 [2022-11-19 06:46:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:26,121 INFO L495 AbstractCegarLoop]: Abstraction has 41571 states and 67077 transitions. [2022-11-19 06:46:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 67077 transitions. [2022-11-19 06:46:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-19 06:46:26,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:26,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:26,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:46:26,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash 905758076, now seen corresponding path program 1 times [2022-11-19 06:46:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:26,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629669002] [2022-11-19 06:46:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:26,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:26,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:26,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629669002] [2022-11-19 06:46:26,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629669002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:26,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:26,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:46:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813112236] [2022-11-19 06:46:26,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:26,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:46:26,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:46:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:46:26,360 INFO L87 Difference]: Start difference. First operand 41571 states and 67077 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:30,221 INFO L93 Difference]: Finished difference Result 82543 states and 133190 transitions. [2022-11-19 06:46:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:46:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 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 234 [2022-11-19 06:46:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:30,294 INFO L225 Difference]: With dead ends: 82543 [2022-11-19 06:46:30,294 INFO L226 Difference]: Without dead ends: 41573 [2022-11-19 06:46:30,328 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 [2022-11-19 06:46:30,329 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 486 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 2888 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:30,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 2888 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:46:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2022-11-19 06:46:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 41571. [2022-11-19 06:46:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41570 states have (on average 1.6112821746451769) internal successors, (66981), 41570 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 66981 transitions. [2022-11-19 06:46:33,693 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 66981 transitions. Word has length 234 [2022-11-19 06:46:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:33,694 INFO L495 AbstractCegarLoop]: Abstraction has 41571 states and 66981 transitions. [2022-11-19 06:46:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 66981 transitions. [2022-11-19 06:46:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-19 06:46:33,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:33,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:46:33,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 06:46:33,698 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:46:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2048774395, now seen corresponding path program 1 times [2022-11-19 06:46:33,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67908625] [2022-11-19 06:46:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:33,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:33,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67908625] [2022-11-19 06:46:33,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67908625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:46:33,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:46:33,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:46:33,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805153572] [2022-11-19 06:46:33,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:46:33,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:46:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:46:33,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:46:33,982 INFO L87 Difference]: Start difference. First operand 41571 states and 66981 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)