./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/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_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/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_6a9b698d-2831-4cf1-8baf-879665f028f6/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 3bd63f2e85879a3b5cd3d111848f55574da866e1b794c0e510a03ddd791b817a --- 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 06:05:49,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:05:49,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:05:49,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:05:49,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:05:49,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:05:49,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:05:49,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:05:49,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:05:49,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:05:49,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:05:49,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:05:49,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:05:49,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:05:49,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:05:49,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:05:49,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:05:49,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:05:49,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:05:49,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:05:49,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:05:49,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:05:49,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:05:49,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:05:49,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:05:49,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:05:49,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:05:49,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:05:49,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:05:49,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:05:49,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:05:49,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:05:49,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:05:49,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:05:49,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:05:49,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:05:49,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:05:49,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:05:49,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:05:49,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:05:49,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:05:49,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:05:49,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:05:49,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:05:49,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:05:49,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:05:49,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:05:49,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:05:49,802 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:05:49,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:05:49,802 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:05:49,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:05:49,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:05:49,803 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:05:49,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:05:49,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:05:49,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:05:49,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:05:49,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:05:49,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:05:49,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:05:49,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:05:49,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:05:49,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:05:49,806 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_6a9b698d-2831-4cf1-8baf-879665f028f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bd63f2e85879a3b5cd3d111848f55574da866e1b794c0e510a03ddd791b817a [2022-12-14 06:05:49,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:05:49,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:05:49,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:05:49,984 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:05:49,985 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:05:49,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c [2022-12-14 06:05:52,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:05:52,943 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:05:52,943 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c [2022-12-14 06:05:52,970 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/data/8d261bdd6/f226c6f18a594e98a4e0873606f452a9/FLAGff18cccf7 [2022-12-14 06:05:53,058 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/data/8d261bdd6/f226c6f18a594e98a4e0873606f452a9 [2022-12-14 06:05:53,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:05:53,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:05:53,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:05:53,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:05:53,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:05:53,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:05:53" (1/1) ... [2022-12-14 06:05:53,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dab0070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:53, skipping insertion in model container [2022-12-14 06:05:53,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:05:53" (1/1) ... [2022-12-14 06:05:53,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:05:53,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:05:54,503 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_6a9b698d-2831-4cf1-8baf-879665f028f6/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[377340,377353] [2022-12-14 06:05:54,529 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_6a9b698d-2831-4cf1-8baf-879665f028f6/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[383339,383352] [2022-12-14 06:05:54,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:05:54,761 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:05:55,580 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_6a9b698d-2831-4cf1-8baf-879665f028f6/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[377340,377353] [2022-12-14 06:05:55,587 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_6a9b698d-2831-4cf1-8baf-879665f028f6/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[383339,383352] [2022-12-14 06:05:55,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:05:55,642 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:05:55,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55 WrapperNode [2022-12-14 06:05:55,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:05:55,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:05:55,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:05:55,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:05:55,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:55,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:55,965 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2022-12-14 06:05:55,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:05:55,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:05:55,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:05:55,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:05:55,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:55,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:05:56,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:05:56,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:05:56,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:05:56,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (1/1) ... [2022-12-14 06:05:56,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:05:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:56,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:05:56,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:05:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:05:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:05:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:05:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:05:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:05:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:05:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:05:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:05:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:05:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:05:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:05:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:05:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:05:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:05:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:05:56,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:05:56,423 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:05:56,425 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:06:01,974 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:06:03,330 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:06:03,330 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-12-14 06:06:03,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:06:03 BoogieIcfgContainer [2022-12-14 06:06:03,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:06:03,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:06:03,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:06:03,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:06:03,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:05:53" (1/3) ... [2022-12-14 06:06:03,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebf0756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:06:03, skipping insertion in model container [2022-12-14 06:06:03,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:55" (2/3) ... [2022-12-14 06:06:03,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebf0756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:06:03, skipping insertion in model container [2022-12-14 06:06:03,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:06:03" (3/3) ... [2022-12-14 06:06:03,340 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.10.cil-2.c [2022-12-14 06:06:03,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:06:03,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:06:03,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:06:03,423 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;@5a99941b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:06:03,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:06:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 06:06:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:06:03,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:03,442 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] [2022-12-14 06:06:03,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1107325504, now seen corresponding path program 1 times [2022-12-14 06:06:03,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:03,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074914315] [2022-12-14 06:06:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:03,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:03,804 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 06:06:03,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074914315] [2022-12-14 06:06:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074914315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:03,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:03,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:06:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576735541] [2022-12-14 06:06:03,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:03,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:06:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:06:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:06:03,841 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 06:06:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:04,603 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2022-12-14 06:06:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:06:04,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2022-12-14 06:06:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:04,619 INFO L225 Difference]: With dead ends: 3767 [2022-12-14 06:06:04,619 INFO L226 Difference]: Without dead ends: 1957 [2022-12-14 06:06:04,625 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 06:06:04,628 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:04,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:06:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-12-14 06:06:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2022-12-14 06:06:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 06:06:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2022-12-14 06:06:04,719 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2022-12-14 06:06:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:04,720 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2022-12-14 06:06:04,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 06:06:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2022-12-14 06:06:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:06:04,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:04,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:06:04,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1978262327, now seen corresponding path program 1 times [2022-12-14 06:06:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:04,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957329139] [2022-12-14 06:06:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:06:04,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957329139] [2022-12-14 06:06:04,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957329139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882247048] [2022-12-14 06:06:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:04,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:04,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:04,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:06:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:05,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:06:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:06:05,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:06:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882247048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:05,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:06:05,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:06:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8812250] [2022-12-14 06:06:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:06:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:06:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:05,179 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 06:06:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:05,553 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2022-12-14 06:06:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:06:05,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 122 [2022-12-14 06:06:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:05,565 INFO L225 Difference]: With dead ends: 2569 [2022-12-14 06:06:05,565 INFO L226 Difference]: Without dead ends: 2259 [2022-12-14 06:06:05,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:06:05,568 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:05,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:06:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-12-14 06:06:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2022-12-14 06:06:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-12-14 06:06:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2022-12-14 06:06:05,647 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2022-12-14 06:06:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:05,648 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2022-12-14 06:06:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 06:06:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2022-12-14 06:06:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:06:05,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:05,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:05,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:06:05,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:05,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -53201513, now seen corresponding path program 1 times [2022-12-14 06:06:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:05,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092898924] [2022-12-14 06:06:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:06:05,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092898924] [2022-12-14 06:06:05,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092898924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302064449] [2022-12-14 06:06:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:05,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:05,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:05,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:06:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:06:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:06:06,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:06:06,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302064449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:06,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:06:06,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:06:06,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872540217] [2022-12-14 06:06:06,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:06,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:06:06,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:06:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:06,191 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 06:06:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:06,599 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2022-12-14 06:06:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:06:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 122 [2022-12-14 06:06:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:06,610 INFO L225 Difference]: With dead ends: 3460 [2022-12-14 06:06:06,610 INFO L226 Difference]: Without dead ends: 2851 [2022-12-14 06:06:06,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:06:06,614 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:06,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:06:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-12-14 06:06:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2022-12-14 06:06:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-14 06:06:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2022-12-14 06:06:06,692 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2022-12-14 06:06:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:06,692 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2022-12-14 06:06:06,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 06:06:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2022-12-14 06:06:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:06:06,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:06,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:06,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:06:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:06,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -571082761, now seen corresponding path program 1 times [2022-12-14 06:06:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:06,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15575829] [2022-12-14 06:06:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:06:06,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15575829] [2022-12-14 06:06:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15575829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224118995] [2022-12-14 06:06:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:07,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:07,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:06:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:06:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:06:07,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:06:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224118995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:07,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:06:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:06:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747202982] [2022-12-14 06:06:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:07,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:06:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:06:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:07,193 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 06:06:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:07,547 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2022-12-14 06:06:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:06:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 122 [2022-12-14 06:06:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:07,559 INFO L225 Difference]: With dead ends: 5218 [2022-12-14 06:06:07,559 INFO L226 Difference]: Without dead ends: 4019 [2022-12-14 06:06:07,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:06:07,590 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:07,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:06:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-12-14 06:06:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2022-12-14 06:06:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-14 06:06:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2022-12-14 06:06:07,689 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2022-12-14 06:06:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:07,689 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2022-12-14 06:06:07,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 06:06:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2022-12-14 06:06:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:06:07,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:07,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:07,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:06:07,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:07,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash -241929641, now seen corresponding path program 1 times [2022-12-14 06:06:07,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:07,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672302551] [2022-12-14 06:06:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:07,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:06:07,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672302551] [2022-12-14 06:06:07,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672302551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:07,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798059577] [2022-12-14 06:06:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:07,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:07,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:07,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:07,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:06:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:06:08,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:06:08,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:06:08,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798059577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:08,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:06:08,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:06:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634804771] [2022-12-14 06:06:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:06:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:06:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:08,179 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 06:06:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:08,616 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2022-12-14 06:06:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:06:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 122 [2022-12-14 06:06:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:08,635 INFO L225 Difference]: With dead ends: 8686 [2022-12-14 06:06:08,635 INFO L226 Difference]: Without dead ends: 6323 [2022-12-14 06:06:08,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:06:08,643 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:08,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:06:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-12-14 06:06:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2022-12-14 06:06:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-12-14 06:06:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2022-12-14 06:06:08,793 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2022-12-14 06:06:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:08,793 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2022-12-14 06:06:08,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 06:06:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2022-12-14 06:06:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:06:08,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:08,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:08,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:06:09,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:09,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash 148331511, now seen corresponding path program 1 times [2022-12-14 06:06:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:09,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257003333] [2022-12-14 06:06:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:09,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:06:09,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257003333] [2022-12-14 06:06:09,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257003333] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488079221] [2022-12-14 06:06:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:09,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:09,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:09,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:09,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:06:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:06:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:06:09,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:06:09,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488079221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:09,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:06:09,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:06:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987320609] [2022-12-14 06:06:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:09,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:06:09,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:06:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:09,417 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 06:06:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:09,955 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2022-12-14 06:06:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:06:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 122 [2022-12-14 06:06:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:09,985 INFO L225 Difference]: With dead ends: 15526 [2022-12-14 06:06:09,986 INFO L226 Difference]: Without dead ends: 10867 [2022-12-14 06:06:09,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 06:06:09,997 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:09,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:06:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2022-12-14 06:06:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2022-12-14 06:06:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-12-14 06:06:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2022-12-14 06:06:10,333 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2022-12-14 06:06:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:10,333 INFO L495 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2022-12-14 06:06:10,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 06:06:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2022-12-14 06:06:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:06:10,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:10,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:10,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:06:10,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a9b698d-2831-4cf1-8baf-879665f028f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:06:10,550 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:10,551 INFO L85 PathProgramCache]: Analyzing trace with hash -846043561, now seen corresponding path program 1 times [2022-12-14 06:06:10,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:10,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576574939] [2022-12-14 06:06:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:10,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:06:10,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576574939] [2022-12-14 06:06:10,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576574939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:10,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:10,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:06:10,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743082789] [2022-12-14 06:06:10,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:10,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:06:10,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:06:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:10,982 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 06:06:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:12,293 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2022-12-14 06:06:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:06:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 122 [2022-12-14 06:06:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:12,342 INFO L225 Difference]: With dead ends: 26597 [2022-12-14 06:06:12,342 INFO L226 Difference]: Without dead ends: 17411 [2022-12-14 06:06:12,361 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 06:06:12,362 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4031 mSDsluCounter, 9794 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4037 SdHoareTripleChecker+Valid, 13094 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:12,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4037 Valid, 13094 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:06:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2022-12-14 06:06:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2022-12-14 06:06:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-12-14 06:06:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2022-12-14 06:06:12,821 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2022-12-14 06:06:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:12,821 INFO L495 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2022-12-14 06:06:12,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 06:06:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2022-12-14 06:06:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:06:12,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:12,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:12,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:06:12,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1168567288, now seen corresponding path program 1 times [2022-12-14 06:06:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907904911] [2022-12-14 06:06:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:06:13,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907904911] [2022-12-14 06:06:13,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907904911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:13,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:13,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:06:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685671961] [2022-12-14 06:06:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:13,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:06:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:06:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:13,092 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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 06:06:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:14,908 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2022-12-14 06:06:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:06:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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 123 [2022-12-14 06:06:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:14,967 INFO L225 Difference]: With dead ends: 36973 [2022-12-14 06:06:14,968 INFO L226 Difference]: Without dead ends: 23323 [2022-12-14 06:06:14,991 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 06:06:14,991 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3977 mSDsluCounter, 9680 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3983 SdHoareTripleChecker+Valid, 12952 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:14,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3983 Valid, 12952 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:06:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2022-12-14 06:06:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2022-12-14 06:06:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2022-12-14 06:06:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2022-12-14 06:06:15,754 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2022-12-14 06:06:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:15,755 INFO L495 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2022-12-14 06:06:15,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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 06:06:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2022-12-14 06:06:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 06:06:15,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:15,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:15,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:06:15,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1690164613, now seen corresponding path program 1 times [2022-12-14 06:06:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:15,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282353784] [2022-12-14 06:06:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:06:16,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282353784] [2022-12-14 06:06:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282353784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:16,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:16,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:06:16,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023732992] [2022-12-14 06:06:16,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:06:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:06:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:16,073 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 06:06:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:18,789 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2022-12-14 06:06:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:06:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 124 [2022-12-14 06:06:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:18,903 INFO L225 Difference]: With dead ends: 72237 [2022-12-14 06:06:18,903 INFO L226 Difference]: Without dead ends: 51955 [2022-12-14 06:06:18,934 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 06:06:18,935 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 4219 mSDsluCounter, 6504 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4238 SdHoareTripleChecker+Valid, 9786 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:18,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4238 Valid, 9786 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:06:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2022-12-14 06:06:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2022-12-14 06:06:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-12-14 06:06:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2022-12-14 06:06:20,745 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2022-12-14 06:06:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:20,745 INFO L495 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2022-12-14 06:06:20,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 06:06:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2022-12-14 06:06:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:06:20,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:20,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:20,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:06:20,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1146472096, now seen corresponding path program 1 times [2022-12-14 06:06:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:20,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487738348] [2022-12-14 06:06:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:06:21,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:21,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487738348] [2022-12-14 06:06:21,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487738348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:21,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:21,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:06:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230291822] [2022-12-14 06:06:21,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:06:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:06:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:21,231 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 06:06:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:25,270 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2022-12-14 06:06:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:06:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 125 [2022-12-14 06:06:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:25,456 INFO L225 Difference]: With dead ends: 108861 [2022-12-14 06:06:25,456 INFO L226 Difference]: Without dead ends: 69163 [2022-12-14 06:06:25,521 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 06:06:25,522 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4040 mSDsluCounter, 9740 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4046 SdHoareTripleChecker+Valid, 13012 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:25,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4046 Valid, 13012 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:06:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2022-12-14 06:06:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2022-12-14 06:06:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2022-12-14 06:06:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2022-12-14 06:06:28,746 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2022-12-14 06:06:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:28,746 INFO L495 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2022-12-14 06:06:28,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 06:06:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2022-12-14 06:06:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 06:06:28,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:28,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:28,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:06:28,790 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:28,790 INFO L85 PathProgramCache]: Analyzing trace with hash -668957933, now seen corresponding path program 1 times [2022-12-14 06:06:28,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193478467] [2022-12-14 06:06:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:28,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:06:29,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193478467] [2022-12-14 06:06:29,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193478467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:29,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:29,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:06:29,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087511893] [2022-12-14 06:06:29,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:29,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:06:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:06:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:29,048 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 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 06:06:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:35,551 INFO L93 Difference]: Finished difference Result 157785 states and 232457 transitions. [2022-12-14 06:06:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:06:35,552 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 126 [2022-12-14 06:06:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:35,816 INFO L225 Difference]: With dead ends: 157785 [2022-12-14 06:06:35,816 INFO L226 Difference]: Without dead ends: 98815 [2022-12-14 06:06:35,915 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 06:06:35,915 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4007 mSDsluCounter, 9710 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4013 SdHoareTripleChecker+Valid, 12982 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:35,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4013 Valid, 12982 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:06:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98815 states. [2022-12-14 06:06:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98815 to 89237. [2022-12-14 06:06:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89237 states, 74759 states have (on average 1.4623924878609933) internal successors, (109327), 75085 states have internal predecessors, (109327), 10588 states have call successors, (10588), 3888 states have call predecessors, (10588), 3888 states have return successors, (10588), 10264 states have call predecessors, (10588), 10588 states have call successors, (10588) [2022-12-14 06:06:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89237 states to 89237 states and 130503 transitions. [2022-12-14 06:06:41,249 INFO L78 Accepts]: Start accepts. Automaton has 89237 states and 130503 transitions. Word has length 126 [2022-12-14 06:06:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:41,250 INFO L495 AbstractCegarLoop]: Abstraction has 89237 states and 130503 transitions. [2022-12-14 06:06:41,250 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 06:06:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 89237 states and 130503 transitions. [2022-12-14 06:06:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 06:06:41,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:41,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:06:41,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:06:41,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1363640512, now seen corresponding path program 1 times [2022-12-14 06:06:41,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:41,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137307215] [2022-12-14 06:06:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:41,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:06:41,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:41,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137307215] [2022-12-14 06:06:41,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137307215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:41,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:41,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:06:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710772446] [2022-12-14 06:06:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:06:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:06:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:06:41,571 INFO L87 Difference]: Start difference. First operand 89237 states and 130503 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 06:06:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:53,624 INFO L93 Difference]: Finished difference Result 284073 states and 416922 transitions. [2022-12-14 06:06:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:06:53,625 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 127 [2022-12-14 06:06:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:54,219 INFO L225 Difference]: With dead ends: 284073 [2022-12-14 06:06:54,219 INFO L226 Difference]: Without dead ends: 196483 [2022-12-14 06:06:54,359 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 06:06:54,359 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 4040 mSDsluCounter, 9618 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4059 SdHoareTripleChecker+Valid, 12878 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:54,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4059 Valid, 12878 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:06:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196483 states. [2022-12-14 06:07:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196483 to 172937. [2022-12-14 06:07:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172937 states, 144635 states have (on average 1.448826355999585) internal successors, (209551), 145285 states have internal predecessors, (209551), 20524 states have call successors, (20524), 7776 states have call predecessors, (20524), 7776 states have return successors, (20524), 19876 states have call predecessors, (20524), 20524 states have call successors, (20524) [2022-12-14 06:07:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172937 states to 172937 states and 250599 transitions. [2022-12-14 06:07:05,096 INFO L78 Accepts]: Start accepts. Automaton has 172937 states and 250599 transitions. Word has length 127 [2022-12-14 06:07:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:07:05,096 INFO L495 AbstractCegarLoop]: Abstraction has 172937 states and 250599 transitions. [2022-12-14 06:07:05,097 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 06:07:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 172937 states and 250599 transitions. [2022-12-14 06:07:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 06:07:05,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:07:05,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:07:05,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:07:05,241 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:07:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:07:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1595465911, now seen corresponding path program 1 times [2022-12-14 06:07:05,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:07:05,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664910173] [2022-12-14 06:07:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:07:05,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:07:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:07:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:07:05,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:07:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664910173] [2022-12-14 06:07:05,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664910173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:07:05,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:07:05,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:07:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654478687] [2022-12-14 06:07:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:07:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:07:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:07:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:07:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:07:05,430 INFO L87 Difference]: Start difference. First operand 172937 states and 250599 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 06:07:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:07:27,119 INFO L93 Difference]: Finished difference Result 507741 states and 732281 transitions. [2022-12-14 06:07:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:07:27,120 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 128 [2022-12-14 06:07:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:07:28,112 INFO L225 Difference]: With dead ends: 507741 [2022-12-14 06:07:28,112 INFO L226 Difference]: Without dead ends: 336451 [2022-12-14 06:07:28,412 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 06:07:28,412 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 7351 mSDsluCounter, 6410 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7370 SdHoareTripleChecker+Valid, 9674 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:07:28,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7370 Valid, 9674 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:07:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336451 states. [2022-12-14 06:07:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336451 to 336449. [2022-12-14 06:07:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336449 states, 281147 states have (on average 1.4375646903577133) internal successors, (404167), 282445 states have internal predecessors, (404167), 39748 states have call successors, (39748), 15552 states have call predecessors, (39748), 15552 states have return successors, (39748), 38452 states have call predecessors, (39748), 39748 states have call successors, (39748) [2022-12-14 06:07:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336449 states to 336449 states and 483663 transitions. [2022-12-14 06:07:51,198 INFO L78 Accepts]: Start accepts. Automaton has 336449 states and 483663 transitions. Word has length 128 [2022-12-14 06:07:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:07:51,198 INFO L495 AbstractCegarLoop]: Abstraction has 336449 states and 483663 transitions. [2022-12-14 06:07:51,198 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 06:07:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 336449 states and 483663 transitions. [2022-12-14 06:07:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 06:07:51,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:07:51,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:07:51,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:07:51,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:07:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:07:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1684573224, now seen corresponding path program 1 times [2022-12-14 06:07:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:07:51,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402451314] [2022-12-14 06:07:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:07:51,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:07:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:07:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:07:51,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:07:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402451314] [2022-12-14 06:07:51,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402451314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:07:51,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:07:51,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:07:51,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388552350] [2022-12-14 06:07:51,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:07:51,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:07:51,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:07:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:07:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:07:51,688 INFO L87 Difference]: Start difference. First operand 336449 states and 483663 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 06:08:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:42,735 INFO L93 Difference]: Finished difference Result 1044933 states and 1512690 transitions. [2022-12-14 06:08:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:08:42,735 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 129 [2022-12-14 06:08:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:45,460 INFO L225 Difference]: With dead ends: 1044933 [2022-12-14 06:08:45,460 INFO L226 Difference]: Without dead ends: 710131 [2022-12-14 06:08:46,299 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 06:08:46,300 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3993 mSDsluCounter, 6453 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4012 SdHoareTripleChecker+Valid, 9713 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:46,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4012 Valid, 9713 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:08:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710131 states. [2022-12-14 06:09:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710131 to 655697. [2022-12-14 06:09:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655697 states, 547691 states have (on average 1.427328548396815) internal successors, (781735), 550285 states have internal predecessors, (781735), 76900 states have call successors, (76900), 31104 states have call predecessors, (76900), 31104 states have return successors, (76900), 74308 states have call predecessors, (76900), 76900 states have call successors, (76900) [2022-12-14 06:09:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655697 states to 655697 states and 935535 transitions. [2022-12-14 06:09:36,469 INFO L78 Accepts]: Start accepts. Automaton has 655697 states and 935535 transitions. Word has length 129 [2022-12-14 06:09:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:36,470 INFO L495 AbstractCegarLoop]: Abstraction has 655697 states and 935535 transitions. [2022-12-14 06:09:36,470 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 06:09:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 655697 states and 935535 transitions. [2022-12-14 06:09:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:09:37,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:37,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:37,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:09:37,087 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:37,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1800818375, now seen corresponding path program 1 times [2022-12-14 06:09:37,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:37,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611892399] [2022-12-14 06:09:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:37,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:09:37,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:37,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611892399] [2022-12-14 06:09:37,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611892399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:37,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:37,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:09:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194125757] [2022-12-14 06:09:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:09:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:09:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:09:37,316 INFO L87 Difference]: Start difference. First operand 655697 states and 935535 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 06:11:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:11:25,100 INFO L93 Difference]: Finished difference Result 1963797 states and 2825106 transitions. [2022-12-14 06:11:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:11:25,100 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 130 [2022-12-14 06:11:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:11:30,304 INFO L225 Difference]: With dead ends: 1963797 [2022-12-14 06:11:30,304 INFO L226 Difference]: Without dead ends: 1309747 [2022-12-14 06:11:32,060 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 06:11:32,061 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3924 mSDsluCounter, 6443 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3943 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:11:32,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3943 Valid, 9703 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:11:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309747 states. [2022-12-14 06:13:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309747 to 1278641. [2022-12-14 06:13:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278641 states, 1067819 states have (on average 1.4174153110218117) internal successors, (1513543), 1073005 states have internal predecessors, (1513543), 148612 states have call successors, (148612), 62208 states have call predecessors, (148612), 62208 states have return successors, (148612), 143428 states have call predecessors, (148612), 148612 states have call successors, (148612) [2022-12-14 06:13:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278641 states to 1278641 states and 1810767 transitions. [2022-12-14 06:13:23,173 INFO L78 Accepts]: Start accepts. Automaton has 1278641 states and 1810767 transitions. Word has length 130 [2022-12-14 06:13:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:13:23,174 INFO L495 AbstractCegarLoop]: Abstraction has 1278641 states and 1810767 transitions. [2022-12-14 06:13:23,174 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 06:13:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1278641 states and 1810767 transitions. [2022-12-14 06:13:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 06:13:24,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:13:24,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:13:24,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:13:24,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:13:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:13:24,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1162317704, now seen corresponding path program 1 times [2022-12-14 06:13:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:13:24,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832932078] [2022-12-14 06:13:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:13:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:13:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:13:24,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:13:24,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832932078] [2022-12-14 06:13:24,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832932078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:13:24,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:13:24,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:13:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272691096] [2022-12-14 06:13:24,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:13:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:13:24,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:13:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:13:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:13:24,432 INFO L87 Difference]: Start difference. First operand 1278641 states and 1810767 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)