./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dd7176ec9512a8a603e4cceffab6b6f1677decce373a9b5c36f88d73957ca4d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:39:17,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:39:17,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:39:17,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:39:17,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:39:17,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:39:17,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:39:17,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:39:17,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:39:17,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:39:17,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:39:17,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:39:17,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:39:17,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:39:17,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:39:17,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:39:17,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:39:17,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:39:17,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:39:17,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:39:17,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:39:17,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:39:17,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:39:17,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:39:17,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:39:17,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:39:17,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:39:17,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:39:17,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:39:17,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:39:17,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:39:17,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:39:17,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:39:17,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:39:17,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:39:17,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:39:17,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:39:17,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:39:17,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:39:17,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:39:17,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:39:17,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:39:17,971 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:39:17,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:39:17,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:39:17,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:39:17,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:39:17,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:39:17,972 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:39:17,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:39:17,973 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:39:17,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:39:17,973 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:39:17,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:39:17,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:39:17,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:39:17,974 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:39:17,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:39:17,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:39:17,975 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:39:17,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:39:17,975 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:39:17,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:39:17,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:39:17,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:39:17,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:39:17,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:39:17,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:39:17,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:39:17,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:39:17,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:39:17,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:39:17,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:39:17,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:39:17,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:39:17,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:39:17,978 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:39:17,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:39:17,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:39:17,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:39:17,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:39:17,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:39:17,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:39:17,979 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_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dd7176ec9512a8a603e4cceffab6b6f1677decce373a9b5c36f88d73957ca4d [2022-12-14 05:39:18,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:39:18,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:39:18,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:39:18,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:39:18,196 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:39:18,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c [2022-12-14 05:39:20,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:39:21,240 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:39:21,241 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c [2022-12-14 05:39:21,273 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/data/8f573f7fd/157d0de76d714dc3aac0e42102c5cb10/FLAG70b240b55 [2022-12-14 05:39:21,283 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/data/8f573f7fd/157d0de76d714dc3aac0e42102c5cb10 [2022-12-14 05:39:21,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:39:21,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:39:21,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:39:21,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:39:21,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:39:21,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:39:21" (1/1) ... [2022-12-14 05:39:21,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d623a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:21, skipping insertion in model container [2022-12-14 05:39:21,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:39:21" (1/1) ... [2022-12-14 05:39:21,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:39:21,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:39:22,734 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[378560,378573] [2022-12-14 05:39:22,755 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[383339,383352] [2022-12-14 05:39:22,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:39:22,985 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:39:23,758 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[378560,378573] [2022-12-14 05:39:23,770 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[383339,383352] [2022-12-14 05:39:23,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:39:23,817 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:39:23,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23 WrapperNode [2022-12-14 05:39:23,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:39:23,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:39:23,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:39:23,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:39:23,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:23,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,095 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13141 [2022-12-14 05:39:24,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:39:24,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:39:24,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:39:24,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:39:24,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,359 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:39:24,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:39:24,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:39:24,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:39:24,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (1/1) ... [2022-12-14 05:39:24,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:39:24,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:24,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:39:24,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:39:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:39:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 05:39:24,501 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 05:39:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 05:39:24,501 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 05:39:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 05:39:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 05:39:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 05:39:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 05:39:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 05:39:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 05:39:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 05:39:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 05:39:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:39:24,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:39:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:39:24,631 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:39:24,633 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:39:30,291 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:39:31,834 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:39:31,834 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 05:39:31,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:39:31 BoogieIcfgContainer [2022-12-14 05:39:31,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:39:31,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:39:31,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:39:31,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:39:31,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:39:21" (1/3) ... [2022-12-14 05:39:31,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e983d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:39:31, skipping insertion in model container [2022-12-14 05:39:31,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:39:23" (2/3) ... [2022-12-14 05:39:31,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e983d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:39:31, skipping insertion in model container [2022-12-14 05:39:31,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:39:31" (3/3) ... [2022-12-14 05:39:31,847 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.11.cil-2.c [2022-12-14 05:39:31,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:39:31,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 05:39:31,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:39:31,944 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;@44277f6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:39:31,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 05:39:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 05:39:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 05:39:31,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:31,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:31,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -69039620, now seen corresponding path program 1 times [2022-12-14 05:39:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096658779] [2022-12-14 05:39:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:32,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096658779] [2022-12-14 05:39:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096658779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:32,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:32,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:39:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348560375] [2022-12-14 05:39:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:32,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:39:32,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:39:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:39:32,392 INFO L87 Difference]: Start difference. First operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:39:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:33,175 INFO L93 Difference]: Finished difference Result 3800 states and 7371 transitions. [2022-12-14 05:39:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:39:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-12-14 05:39:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:33,198 INFO L225 Difference]: With dead ends: 3800 [2022-12-14 05:39:33,198 INFO L226 Difference]: Without dead ends: 1979 [2022-12-14 05:39:33,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:39:33,207 INFO L413 NwaCegarLoop]: 3481 mSDtfsCounter, 3746 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:33,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 6868 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:39:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-12-14 05:39:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2022-12-14 05:39:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1918 states have (on average 1.9228362877997915) internal successors, (3688), 1921 states have internal predecessors, (3688), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 05:39:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3780 transitions. [2022-12-14 05:39:33,307 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3780 transitions. Word has length 64 [2022-12-14 05:39:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3780 transitions. [2022-12-14 05:39:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:39:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3780 transitions. [2022-12-14 05:39:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:33,312 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:33,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:33,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:39:33,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2031621669, now seen corresponding path program 1 times [2022-12-14 05:39:33,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:33,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743008558] [2022-12-14 05:39:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:39:33,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743008558] [2022-12-14 05:39:33,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743008558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443340247] [2022-12-14 05:39:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:33,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:33,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:39:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:39:33,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:39:33,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:39:33,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443340247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:33,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:39:33,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:39:33,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792516154] [2022-12-14 05:39:33,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:33,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:33,782 INFO L87 Difference]: Start difference. First operand 1978 states and 3780 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:34,228 INFO L93 Difference]: Finished difference Result 2635 states and 4805 transitions. [2022-12-14 05:39:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:34,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-12-14 05:39:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:34,241 INFO L225 Difference]: With dead ends: 2635 [2022-12-14 05:39:34,242 INFO L226 Difference]: Without dead ends: 2303 [2022-12-14 05:39:34,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:34,245 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3489 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:34,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3536 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:39:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-12-14 05:39:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2022-12-14 05:39:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2187 states have (on average 1.8715134887974394) internal successors, (4093), 2191 states have internal predecessors, (4093), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 05:39:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4265 transitions. [2022-12-14 05:39:34,331 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4265 transitions. Word has length 129 [2022-12-14 05:39:34,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:34,332 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4265 transitions. [2022-12-14 05:39:34,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4265 transitions. [2022-12-14 05:39:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:34,340 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:34,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:34,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:39:34,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:34,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:34,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1996034279, now seen corresponding path program 1 times [2022-12-14 05:39:34,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911719809] [2022-12-14 05:39:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:39:34,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:34,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911719809] [2022-12-14 05:39:34,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911719809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099511201] [2022-12-14 05:39:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:34,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:34,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:34,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:39:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:39:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:39:34,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:39:34,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099511201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:34,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:39:34,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:39:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274638926] [2022-12-14 05:39:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:34,942 INFO L87 Difference]: Start difference. First operand 2299 states and 4265 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:35,341 INFO L93 Difference]: Finished difference Result 3592 states and 6276 transitions. [2022-12-14 05:39:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-12-14 05:39:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:35,351 INFO L225 Difference]: With dead ends: 3592 [2022-12-14 05:39:35,351 INFO L226 Difference]: Without dead ends: 2939 [2022-12-14 05:39:35,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:35,355 INFO L413 NwaCegarLoop]: 3314 mSDtfsCounter, 3501 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:35,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3524 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:39:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-12-14 05:39:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2022-12-14 05:39:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2719 states have (on average 1.7988230967267378) internal successors, (4891), 2725 states have internal predecessors, (4891), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-12-14 05:39:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5219 transitions. [2022-12-14 05:39:35,425 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5219 transitions. Word has length 129 [2022-12-14 05:39:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:35,425 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5219 transitions. [2022-12-14 05:39:35,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5219 transitions. [2022-12-14 05:39:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:35,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:35,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:35,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:39:35,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:35,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1484650665, now seen corresponding path program 1 times [2022-12-14 05:39:35,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:35,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574040456] [2022-12-14 05:39:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:39:35,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574040456] [2022-12-14 05:39:35,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574040456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371807314] [2022-12-14 05:39:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:35,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:35,729 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:35,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:39:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:39:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:39:35,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:39:35,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371807314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:35,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:39:35,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:39:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893635628] [2022-12-14 05:39:35,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:35,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:35,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:35,941 INFO L87 Difference]: Start difference. First operand 2933 states and 5219 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:36,450 INFO L93 Difference]: Finished difference Result 5482 states and 9168 transitions. [2022-12-14 05:39:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-12-14 05:39:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:36,467 INFO L225 Difference]: With dead ends: 5482 [2022-12-14 05:39:36,467 INFO L226 Difference]: Without dead ends: 4195 [2022-12-14 05:39:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:36,472 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 3507 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:36,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3534 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:39:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-12-14 05:39:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2022-12-14 05:39:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3771 states have (on average 1.7138690002651817) internal successors, (6463), 3781 states have internal predecessors, (6463), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-12-14 05:39:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7095 transitions. [2022-12-14 05:39:36,618 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7095 transitions. Word has length 129 [2022-12-14 05:39:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:36,619 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 7095 transitions. [2022-12-14 05:39:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7095 transitions. [2022-12-14 05:39:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:36,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:36,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:36,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:39:36,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:36,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash -588085525, now seen corresponding path program 1 times [2022-12-14 05:39:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:36,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857954594] [2022-12-14 05:39:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:36,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:39:36,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857954594] [2022-12-14 05:39:36,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857954594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155941123] [2022-12-14 05:39:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:36,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:36,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:36,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:36,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:39:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:37,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:39:37,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 05:39:37,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:39:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155941123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:37,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:39:37,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:39:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852664316] [2022-12-14 05:39:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:37,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:37,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:37,140 INFO L87 Difference]: Start difference. First operand 4185 states and 7095 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:37,598 INFO L93 Difference]: Finished difference Result 9214 states and 14852 transitions. [2022-12-14 05:39:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-12-14 05:39:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:37,628 INFO L225 Difference]: With dead ends: 9214 [2022-12-14 05:39:37,628 INFO L226 Difference]: Without dead ends: 6675 [2022-12-14 05:39:37,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:37,642 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3510 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:37,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:39:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-12-14 05:39:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2022-12-14 05:39:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5851 states have (on average 1.6337378225944283) internal successors, (9559), 5869 states have internal predecessors, (9559), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-12-14 05:39:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10783 transitions. [2022-12-14 05:39:37,892 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10783 transitions. Word has length 129 [2022-12-14 05:39:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:37,892 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10783 transitions. [2022-12-14 05:39:37,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10783 transitions. [2022-12-14 05:39:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:37,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:37,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:37,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:39:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:38,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -727107223, now seen corresponding path program 1 times [2022-12-14 05:39:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:38,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099678831] [2022-12-14 05:39:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:39:38,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099678831] [2022-12-14 05:39:38,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099678831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720629502] [2022-12-14 05:39:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:38,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:38,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:38,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:39:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:39:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:39:38,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:39:38,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720629502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:38,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:39:38,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:39:38,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923239597] [2022-12-14 05:39:38,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:38,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:38,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:38,448 INFO L87 Difference]: Start difference. First operand 6657 states and 10783 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:38,980 INFO L93 Difference]: Finished difference Result 16582 states and 26020 transitions. [2022-12-14 05:39:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:38,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-12-14 05:39:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:39,012 INFO L225 Difference]: With dead ends: 16582 [2022-12-14 05:39:39,012 INFO L226 Difference]: Without dead ends: 11571 [2022-12-14 05:39:39,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:39,024 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3483 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:39,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:39:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2022-12-14 05:39:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2022-12-14 05:39:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 9963 states have (on average 1.571313861286761) internal successors, (15655), 9997 states have internal predecessors, (15655), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-12-14 05:39:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 18031 transitions. [2022-12-14 05:39:39,303 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 18031 transitions. Word has length 129 [2022-12-14 05:39:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:39,304 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 18031 transitions. [2022-12-14 05:39:39,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 18031 transitions. [2022-12-14 05:39:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:39,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:39,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:39,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 05:39:39,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:39,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:39,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash 579202475, now seen corresponding path program 1 times [2022-12-14 05:39:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:39,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997644713] [2022-12-14 05:39:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:39:39,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997644713] [2022-12-14 05:39:39,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997644713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324817070] [2022-12-14 05:39:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:39,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:39,607 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:39,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:39:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:39:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 05:39:39,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:39:39,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324817070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:39,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:39:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:39:39,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25776740] [2022-12-14 05:39:39,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:39:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:39:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:39,794 INFO L87 Difference]: Start difference. First operand 11537 states and 18031 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:40,562 INFO L93 Difference]: Finished difference Result 31126 states and 47956 transitions. [2022-12-14 05:39:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:39:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-12-14 05:39:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:40,618 INFO L225 Difference]: With dead ends: 31126 [2022-12-14 05:39:40,619 INFO L226 Difference]: Without dead ends: 21235 [2022-12-14 05:39:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:40,652 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3495 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:40,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:39:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21235 states. [2022-12-14 05:39:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21235 to 21169. [2022-12-14 05:39:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18091 states have (on average 1.5286606599966834) internal successors, (27655), 18157 states have internal predecessors, (27655), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-12-14 05:39:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 32271 transitions. [2022-12-14 05:39:41,233 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 32271 transitions. Word has length 129 [2022-12-14 05:39:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:41,233 INFO L495 AbstractCegarLoop]: Abstraction has 21169 states and 32271 transitions. [2022-12-14 05:39:41,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:39:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 32271 transitions. [2022-12-14 05:39:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 05:39:41,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:41,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:41,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:39:41,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f1516da-43e3-4d1a-b897-3d2950249f27/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:41,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 616320749, now seen corresponding path program 1 times [2022-12-14 05:39:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552557420] [2022-12-14 05:39:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:41,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:39:41,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552557420] [2022-12-14 05:39:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552557420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:41,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:41,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:39:41,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467241798] [2022-12-14 05:39:41,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:39:41,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:39:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:41,815 INFO L87 Difference]: Start difference. First operand 21169 states and 32271 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:39:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:43,718 INFO L93 Difference]: Finished difference Result 66869 states and 100498 transitions. [2022-12-14 05:39:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:39:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-12-14 05:39:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:43,870 INFO L225 Difference]: With dead ends: 66869 [2022-12-14 05:39:43,870 INFO L226 Difference]: Without dead ends: 47347 [2022-12-14 05:39:43,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:39:43,915 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 4192 mSDsluCounter, 6529 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4212 SdHoareTripleChecker+Valid, 9834 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:43,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4212 Valid, 9834 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:39:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2022-12-14 05:39:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 39921. [2022-12-14 05:39:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39921 states, 33899 states have (on average 1.5011357267176022) internal successors, (50887), 34029 states have internal predecessors, (50887), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2022-12-14 05:39:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39921 states to 39921 states and 59855 transitions. [2022-12-14 05:39:45,251 INFO L78 Accepts]: Start accepts. Automaton has 39921 states and 59855 transitions. Word has length 129 [2022-12-14 05:39:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:45,252 INFO L495 AbstractCegarLoop]: Abstraction has 39921 states and 59855 transitions. [2022-12-14 05:39:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:39:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 39921 states and 59855 transitions. [2022-12-14 05:39:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 05:39:45,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:45,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:45,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:39:45,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:45,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1700573474, now seen corresponding path program 1 times [2022-12-14 05:39:45,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:45,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895164350] [2022-12-14 05:39:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:45,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:39:45,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895164350] [2022-12-14 05:39:45,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895164350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:45,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:45,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:39:45,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622834808] [2022-12-14 05:39:45,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:45,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:39:45,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:45,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:39:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:45,674 INFO L87 Difference]: Start difference. First operand 39921 states and 59855 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:39:49,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:49,260 INFO L93 Difference]: Finished difference Result 125941 states and 187986 transitions. [2022-12-14 05:39:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:39:49,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-12-14 05:39:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:49,494 INFO L225 Difference]: With dead ends: 125941 [2022-12-14 05:39:49,495 INFO L226 Difference]: Without dead ends: 87667 [2022-12-14 05:39:49,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:39:49,566 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 4126 mSDsluCounter, 9658 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4146 SdHoareTripleChecker+Valid, 12933 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:49,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4146 Valid, 12933 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:39:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87667 states. [2022-12-14 05:39:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87667 to 76657. [2022-12-14 05:39:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76657 states, 64875 states have (on average 1.4828362235067438) internal successors, (96199), 65133 states have internal predecessors, (96199), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2022-12-14 05:39:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76657 states to 76657 states and 113615 transitions. [2022-12-14 05:39:52,743 INFO L78 Accepts]: Start accepts. Automaton has 76657 states and 113615 transitions. Word has length 130 [2022-12-14 05:39:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:52,744 INFO L495 AbstractCegarLoop]: Abstraction has 76657 states and 113615 transitions. [2022-12-14 05:39:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:39:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 76657 states and 113615 transitions. [2022-12-14 05:39:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 05:39:52,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:52,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:52,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:39:52,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1622625677, now seen corresponding path program 1 times [2022-12-14 05:39:52,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:52,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538948126] [2022-12-14 05:39:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:52,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:39:53,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:53,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538948126] [2022-12-14 05:39:53,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538948126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:39:53,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:39:53,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:39:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74813267] [2022-12-14 05:39:53,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:39:53,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:39:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:39:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:39:53,084 INFO L87 Difference]: Start difference. First operand 76657 states and 113615 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:40:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:01,336 INFO L93 Difference]: Finished difference Result 264565 states and 390098 transitions. [2022-12-14 05:40:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:40:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-12-14 05:40:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:01,885 INFO L225 Difference]: With dead ends: 264565 [2022-12-14 05:40:01,885 INFO L226 Difference]: Without dead ends: 189555 [2022-12-14 05:40:02,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:40:02,036 INFO L413 NwaCegarLoop]: 3295 mSDtfsCounter, 4250 mSDsluCounter, 9710 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4270 SdHoareTripleChecker+Valid, 13005 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:02,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4270 Valid, 13005 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:40:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189555 states. [2022-12-14 05:40:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189555 to 148593. [2022-12-14 05:40:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148593 states, 125547 states have (on average 1.4697205030785283) internal successors, (184519), 126061 states have internal predecessors, (184519), 16900 states have call successors, (16900), 6144 states have call predecessors, (16900), 6144 states have return successors, (16900), 16388 states have call predecessors, (16900), 16900 states have call successors, (16900) [2022-12-14 05:40:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148593 states to 148593 states and 218319 transitions. [2022-12-14 05:40:09,064 INFO L78 Accepts]: Start accepts. Automaton has 148593 states and 218319 transitions. Word has length 131 [2022-12-14 05:40:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:40:09,064 INFO L495 AbstractCegarLoop]: Abstraction has 148593 states and 218319 transitions. [2022-12-14 05:40:09,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:40:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 148593 states and 218319 transitions. [2022-12-14 05:40:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 05:40:09,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:40:09,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:40:09,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:40:09,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:40:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:40:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2002284614, now seen corresponding path program 1 times [2022-12-14 05:40:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:40:09,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806847827] [2022-12-14 05:40:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:40:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:40:09,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:40:09,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806847827] [2022-12-14 05:40:09,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806847827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:40:09,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:40:09,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:40:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480019441] [2022-12-14 05:40:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:40:09,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:40:09,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:40:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:40:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:40:09,463 INFO L87 Difference]: Start difference. First operand 148593 states and 218319 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:40:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:22,324 INFO L93 Difference]: Finished difference Result 400757 states and 589521 transitions. [2022-12-14 05:40:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:40:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2022-12-14 05:40:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:23,183 INFO L225 Difference]: With dead ends: 400757 [2022-12-14 05:40:23,183 INFO L226 Difference]: Without dead ends: 253811 [2022-12-14 05:40:23,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:40:23,406 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 4160 mSDsluCounter, 6577 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 9865 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:23,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4166 Valid, 9865 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:40:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253811 states. [2022-12-14 05:40:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253811 to 220017. [2022-12-14 05:40:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220017 states, 185707 states have (on average 1.4622981363115015) internal successors, (271559), 186477 states have internal predecessors, (271559), 25092 states have call successors, (25092), 9216 states have call predecessors, (25092), 9216 states have return successors, (25092), 24324 states have call predecessors, (25092), 25092 states have call successors, (25092) [2022-12-14 05:40:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220017 states to 220017 states and 321743 transitions. [2022-12-14 05:40:34,854 INFO L78 Accepts]: Start accepts. Automaton has 220017 states and 321743 transitions. Word has length 132 [2022-12-14 05:40:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:40:34,854 INFO L495 AbstractCegarLoop]: Abstraction has 220017 states and 321743 transitions. [2022-12-14 05:40:34,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:40:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 220017 states and 321743 transitions. [2022-12-14 05:40:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 05:40:35,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:40:35,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:40:35,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 05:40:35,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:40:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:40:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash -219094355, now seen corresponding path program 1 times [2022-12-14 05:40:35,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:40:35,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238850220] [2022-12-14 05:40:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:40:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:40:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:40:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:40:35,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:40:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238850220] [2022-12-14 05:40:35,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238850220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:40:35,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:40:35,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:40:35,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172958363] [2022-12-14 05:40:35,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:40:35,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:40:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:40:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:40:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:40:35,249 INFO L87 Difference]: Start difference. First operand 220017 states and 321743 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:40:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:40:53,763 INFO L93 Difference]: Finished difference Result 544501 states and 794833 transitions. [2022-12-14 05:40:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:40:53,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 133 [2022-12-14 05:40:53,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:40:55,125 INFO L225 Difference]: With dead ends: 544501 [2022-12-14 05:40:55,125 INFO L226 Difference]: Without dead ends: 326131 [2022-12-14 05:40:55,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:40:55,479 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 7441 mSDsluCounter, 6447 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7461 SdHoareTripleChecker+Valid, 9721 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:40:55,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7461 Valid, 9721 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:40:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326131 states. [2022-12-14 05:41:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326131 to 326129. [2022-12-14 05:41:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326129 states, 275051 states have (on average 1.4554646229244759) internal successors, (400327), 276205 states have internal predecessors, (400327), 37252 states have call successors, (37252), 13824 states have call predecessors, (37252), 13824 states have return successors, (37252), 36100 states have call predecessors, (37252), 37252 states have call successors, (37252) [2022-12-14 05:41:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326129 states to 326129 states and 474831 transitions. [2022-12-14 05:41:13,821 INFO L78 Accepts]: Start accepts. Automaton has 326129 states and 474831 transitions. Word has length 133 [2022-12-14 05:41:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:41:13,822 INFO L495 AbstractCegarLoop]: Abstraction has 326129 states and 474831 transitions. [2022-12-14 05:41:13,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:41:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 326129 states and 474831 transitions. [2022-12-14 05:41:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 05:41:14,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:41:14,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:41:14,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 05:41:14,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:41:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:41:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -498980586, now seen corresponding path program 1 times [2022-12-14 05:41:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:41:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112277241] [2022-12-14 05:41:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:41:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:41:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:41:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:41:14,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:41:14,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112277241] [2022-12-14 05:41:14,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112277241] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:41:14,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:41:14,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:41:14,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30620278] [2022-12-14 05:41:14,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:41:14,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:41:14,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:41:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:41:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:41:14,601 INFO L87 Difference]: Start difference. First operand 326129 states and 474831 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:41:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:41:48,712 INFO L93 Difference]: Finished difference Result 866997 states and 1267025 transitions. [2022-12-14 05:41:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:41:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 134 [2022-12-14 05:41:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:41:50,623 INFO L225 Difference]: With dead ends: 866997 [2022-12-14 05:41:50,623 INFO L226 Difference]: Without dead ends: 542515 [2022-12-14 05:41:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:41:51,250 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 4113 mSDsluCounter, 6557 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 9845 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:41:51,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4119 Valid, 9845 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:41:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542515 states. [2022-12-14 05:42:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542515 to 483761. [2022-12-14 05:42:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483761 states, 407723 states have (on average 1.4490009148367886) internal successors, (590791), 409453 states have internal predecessors, (590791), 55300 states have call successors, (55300), 20736 states have call predecessors, (55300), 20736 states have return successors, (55300), 53572 states have call predecessors, (55300), 55300 states have call successors, (55300) [2022-12-14 05:42:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483761 states to 483761 states and 701391 transitions. [2022-12-14 05:42:22,947 INFO L78 Accepts]: Start accepts. Automaton has 483761 states and 701391 transitions. Word has length 134 [2022-12-14 05:42:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:42:22,948 INFO L495 AbstractCegarLoop]: Abstraction has 483761 states and 701391 transitions. [2022-12-14 05:42:22,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:42:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 483761 states and 701391 transitions. [2022-12-14 05:42:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 05:42:23,340 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:42:23,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:42:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 05:42:23,340 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:42:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:42:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1104253401, now seen corresponding path program 1 times [2022-12-14 05:42:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:42:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700264995] [2022-12-14 05:42:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:42:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:42:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:42:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:42:23,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:42:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700264995] [2022-12-14 05:42:23,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700264995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:42:23,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:42:23,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:42:23,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769541909] [2022-12-14 05:42:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:42:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:42:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:42:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:42:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:42:23,717 INFO L87 Difference]: Start difference. First operand 483761 states and 701391 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:43:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:18,845 INFO L93 Difference]: Finished difference Result 1262229 states and 1839281 transitions. [2022-12-14 05:43:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:43:18,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 135 [2022-12-14 05:43:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:21,717 INFO L225 Difference]: With dead ends: 1262229 [2022-12-14 05:43:21,717 INFO L226 Difference]: Without dead ends: 780115 [2022-12-14 05:43:23,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:43:23,049 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 4043 mSDsluCounter, 9733 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4049 SdHoareTripleChecker+Valid, 13021 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:23,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4049 Valid, 13021 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:43:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780115 states. [2022-12-14 05:44:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780115 to 717905. [2022-12-14 05:44:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717905 states, 604715 states have (on average 1.4427540246231696) internal successors, (872455), 607309 states have internal predecessors, (872455), 82084 states have call successors, (82084), 31104 states have call predecessors, (82084), 31104 states have return successors, (82084), 79492 states have call predecessors, (82084), 82084 states have call successors, (82084) [2022-12-14 05:44:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717905 states to 717905 states and 1036623 transitions. [2022-12-14 05:44:20,346 INFO L78 Accepts]: Start accepts. Automaton has 717905 states and 1036623 transitions. Word has length 135 [2022-12-14 05:44:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 717905 states and 1036623 transitions. [2022-12-14 05:44:20,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:44:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 717905 states and 1036623 transitions. [2022-12-14 05:44:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 05:44:21,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:21,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:21,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 05:44:21,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:44:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1801748114, now seen corresponding path program 1 times [2022-12-14 05:44:21,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:44:21,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737913727] [2022-12-14 05:44:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:44:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:44:21,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:44:21,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737913727] [2022-12-14 05:44:21,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737913727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:21,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:21,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:44:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321739130] [2022-12-14 05:44:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:21,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:44:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:44:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:44:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:44:21,442 INFO L87 Difference]: Start difference. First operand 717905 states and 1036623 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:46:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:21,714 INFO L93 Difference]: Finished difference Result 2264469 states and 3289074 transitions. [2022-12-14 05:46:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:46:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-12-14 05:46:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:28,238 INFO L225 Difference]: With dead ends: 2264469 [2022-12-14 05:46:28,238 INFO L226 Difference]: Without dead ends: 1548211 [2022-12-14 05:46:30,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:46:30,198 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 4064 mSDsluCounter, 9648 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4084 SdHoareTripleChecker+Valid, 12923 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:30,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4084 Valid, 12923 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:46:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548211 states. [2022-12-14 05:48:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548211 to 1403057. [2022-12-14 05:48:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403057 states, 1181867 states have (on average 1.434157142893405) internal successors, (1694983), 1187053 states have internal predecessors, (1694983), 158980 states have call successors, (158980), 62208 states have call predecessors, (158980), 62208 states have return successors, (158980), 153796 states have call predecessors, (158980), 158980 states have call successors, (158980) [2022-12-14 05:48:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403057 states to 1403057 states and 2012943 transitions. [2022-12-14 05:48:26,226 INFO L78 Accepts]: Start accepts. Automaton has 1403057 states and 2012943 transitions. Word has length 136 [2022-12-14 05:48:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:48:26,227 INFO L495 AbstractCegarLoop]: Abstraction has 1403057 states and 2012943 transitions. [2022-12-14 05:48:26,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:48:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1403057 states and 2012943 transitions. [2022-12-14 05:48:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 05:48:27,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:48:27,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:48:27,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 05:48:27,944 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:48:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:48:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1487310205, now seen corresponding path program 1 times [2022-12-14 05:48:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:48:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028021961] [2022-12-14 05:48:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:48:27,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:48:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:48:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:48:28,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:48:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028021961] [2022-12-14 05:48:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028021961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:48:28,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:48:28,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:48:28,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271351156] [2022-12-14 05:48:28,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:48:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:48:28,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:48:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:48:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:48:28,258 INFO L87 Difference]: Start difference. First operand 1403057 states and 2012943 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)